Number of results: 195,405
Math
Real numbers include rational, irrational, integers, and natural numbers. Real numbers form a subset of complex numbers. So when a number is not real, it is usually complex. Can you spot a complex number from the list?
Thursday, October 28, 2010 at 7:33pm by MathMate
Math
I am in the 5th grade and my homework tonight is about complex numbers. I have no idea how to do complex numbers, not to mention, I dont know what they are. Can you help me?
Wednesday, October 27, 2010 at 3:42pm by Jeida
Math (Complex Numbers)
Let a,b,c be complex numbers satisfying a+b+c=abc=1 and (ab+bc+ac)/3=(1/a^2)+(1/b^2)+(1c^2) The sum of absolute values of all possible ab+bc+ac can be written as (√n)/m, where n and m are positive coprime integers. What is n+m?
Thursday, May 9, 2013 at 9:55am by Mahler
Math Help
Is 3 sqrt -16 supposed to mean (sqrt 3) -16 or 3*(sqrt -16) ?? If you are talking about the square root of negative numbers, the answer will be a complex number. Are you studying complex numbers?
Friday, October 19, 2007 at 7:54pm by drwls
math
I am not sure what you mean by the "trig form" of a complex number. The magnitude is sqrt(7^2 + 2^2) = sqrt53 The complex unit vector is e^(i*theta) where theta = arcsin(-2/7) - -16.6 degrees or -0.29 radians Thus 7 -2i = sqrt53*e^-0.29i In the second questiuon, you ...
Thursday, December 30, 2010 at 11:00am by drwls
12th grade - Math
The magnitude of a complex number is defined in the complex space where the real numbers are on the horizontal axis, and the complex (imaginary) part is on the vertical axis. The magnitude is defined to be the distance of the given point to the origin, namely for a complex ...
Wednesday, September 1, 2010 at 8:22am by MathMate
Complex Numbers
Oh thank you so much i forgot that when you that the square root of a negative you get the complex #
Monday, January 31, 2011 at 9:03pm by Allie
complex numbers
the complex number Z satisfies (Z+i)/(1+2i)= iz Find Z. please help thx!
Tuesday, November 4, 2008 at 1:43pm by Mary
complex numbers
the complex number Z satisfies Z+i/(1+2i)= iz Find Z. please help thx!
Tuesday, November 4, 2008 at 7:22am by Mary
Calculus--complex numbers
the complex number Z satisfies Z/(Z+4)= 3+2i Find Z. please help thx!
Thursday, March 13, 2008 at 7:11am by Anne
math
solve and simplify the answer completely by using pure imaginary numbers/complex numbers. 2x^2+3x+2=0
Thursday, December 4, 2008 at 9:20pm by anonymous
math
You asked this question before. I see no reason why any numbers, even complex numbers, cannot be arranged in a two-column array.
Monday, September 10, 2007 at 4:15pm by drwls
algebra
a.natural numbers Numbers that are non-negative integers, such as 1,2,12,201,... There are two definitions of natural numbers, one that includes 0, and the other one does not. Most high-school definitions include 0. b.whole numbers Whole numbers do not have decimals nor ...
Tuesday, September 1, 2009 at 10:20pm by MathMate
English
1) complex 2) complex 3) complex 4)simple 5)complex 6)complex 7)compound 8) Simple 9)simple 10)simple 11)Complex 12)complex 13)Simple
Tuesday, November 9, 2010 at 2:10pm by Tom Jameson
Algebra
2k^2 = -144 k^2 = -72 Unless you have studied complex numbers you would stop here and say "there is no real solution" since you cannot take the square root of a negative. If you studied complex numbers you should know that i = √-1 so x = √-72 x...
Monday, March 17, 2008 at 10:21pm by Reiny
trig
Are you familar with the method of changing a complex number of the a + bi into polar form. If not, here is a good page http://www.intmath.com/Complex-numbers/4_Polar-form.php notice that a + bi would be a unique position on the grid, so ....
Monday, March 1, 2010 at 4:47pm by Reiny
calculus
can you please explain tep by step how to solve dividing complex numbers strictly using a graph, the complex plane. I know how to do it algebraically, but not graphically. thankyou
Saturday, June 9, 2012 at 10:34am by wendell
oops - math
silly me, forgot to include the link http://www.intmath.com/complex-numbers/4-polar-form.php
Thursday, December 30, 2010 at 11:00am by Reiny
Algebra II
Yes, the numbers in a matrix can have any value, positive or negative, fractions, decimals and irrational numbers, not just integers from 0 to 9. They can also be complex numbers like 4 + 3.1 i [3 4] +[2 7] = [5 11] , for example
Saturday, October 27, 2007 at 7:25pm by drwls
Math
It looks like you have not learned about imaginary numbers or complex numbers by definition √-1 = i so -√-76 + √-125 = -√36√2√-1 + √25√5√-1 = -6√2 i + 5√5 i yes, the ...
Wednesday, September 8, 2010 at 2:56pm by Reiny
Maths- complex numbers
Find tan(3 theta) in terms of tan theta Use the formula tan (a + b) = (tan a + tan b)/[1 - tan a tan b) in two steps. First, let a = b = theta and get a formula for tan (2 theta). tan (2 theta) = 2 tan theta/[(1 - tan theta)^2] Then write down the equation for tan (2 theta + ...
Tuesday, February 13, 2007 at 2:45am by Jake
Abstract Algebra
Let H={a+bi a,b is a element R, a^2+b^2=1} be a subset of the non zero complex numbers C*. Prove that H<C* under complex multiplication using the one-step subgroup test. Also describe the elements of H geometrically.
Friday, December 7, 2007 at 9:22am by Devin
algebra ll-imaginary numbers
do a google search for "complex numbers"
Wednesday, March 18, 2009 at 7:50am by Reiny
division of complex numbers
no, use 2-3i, because (2+3i)(2-3i) = 4 - 9i^2 = 4+9 = 13 and you get rid of the complex number in the bottom
Monday, January 16, 2012 at 4:13pm by Steve
Math
Factor the polynomial as the product of factors that are irreducible over the real numbers. Then write the polynomial in completely factored form involving complex nonreal or imaginary numbers. x^4 + 20x^2 -44=0
Tuesday, January 31, 2012 at 7:38pm by Chelsea
Math Help Please
There is a little rule of thumb that you can count on for finding zeroes of polynomials with complex roots. Complex roots always come in pairs. Each root of the pair is the complex conjugate of the other. For example, if you have a root as 4+3i, the other root must be 4-3i. If...
Wednesday, July 22, 2009 at 11:20pm by MathMate
Algebra
3 i or 3 times the square root of -1 If you have not had imaginary numbers in your course, the answer is no real number solution no, square root of 2 or [ sqrt 2 } Yes there is an answer to the square root of a negative number but not in real numbers. If you have not covered ...
Saturday, September 8, 2012 at 8:38pm by Damon
ALGEBRA!!
calculate P(i) for the following polynomial p(x)=x3+2x2-5x+8 Find | z | for each of the following complex numbers and represent them on a complex plane. a. z=-3-4i b. v=5-12i c.u=7+24i d.w=-9+40i e.p=1+3i f.t=-2i g.n=4 h.m=0 i.s=(√3-i)2
Thursday, October 7, 2010 at 2:09pm by natali
Math (Complex Numbers)
76
Thursday, May 9, 2013 at 9:55am by Athul
Math
These are complex numbers by the way.
Monday, November 23, 2009 at 10:35am by Nayla
Math
simplify (8 – i) – (4 – i) using Complex Numbers
Wednesday, September 7, 2011 at 12:43am by Peter
math b
divide complex numbers: 2+3-3i^3/1-i
Wednesday, April 1, 2009 at 8:48pm by annaiiz
math
in real numbers there is no solution, since x^2 is always positive, so adding 9 will never be zero. In complex numbers, the solutions are 3i and -3i, since i^2 = -1.
Friday, November 23, 2012 at 2:41am by Steve
Math
Factor over {complex numbers} 9x^2 + 49
Monday, April 9, 2012 at 9:34am by Nathan
math
Simplify the following product of complex numbers. (8 + i) • (-4 – 3i)
Wednesday, March 2, 2011 at 9:03pm by Jackster
math b
last question finally simplify complex numbers: i^16/i^3
Wednesday, April 1, 2009 at 9:45pm by annaiiz
math
no, i entered it correctly. the unit is complex numbers and polynomials
Tuesday, February 24, 2009 at 8:31pm by isha
Pre-Calculus
You're right, it is a W-shape, and in this case, it is more like a flattened parabola. The curve never touched the x-axis, so there are no real roots. In other words, all four roots are complex. Are you familiar with solving a quartic? and working with complex numbers?
Tuesday, September 8, 2009 at 10:22pm by MathMate
Math - complex numbers
Sorry, yes I meant from 0 to pi/2 for the last two questions.
Saturday, December 17, 2011 at 12:59am by Chiquesta
math complex numbers
oops, I forgot the 3i, so the answer is 4+i check that.
Wednesday, November 17, 2010 at 8:45pm by bobpursley
English
Identify the structure used in each of the sentences below. 1. The hamburger came from Hamburg, Germany, and the hot dog came from Frankfurt. simple compound complex compound-complex 2. The idea of placing meat on a bun, however, came from the United States. simple compound ...
Friday, December 28, 2012 at 9:04am by Fate
pre-calculus
You are given 2 real roots and one complex. As I noted before, complex numbers come in pairs, so there has to be another one, 1+2i so we have f(x) = (x+1)(x-2)(x-1-2i)(x-1+2i) multiply the last two brackets, the i's will drop out
Saturday, March 13, 2010 at 4:18pm by Reiny
Math
Michele's answer is not correct x^=-9 has no solution in the set of real numbers (x=-3 is a real number solution) You will have to use imaginary or complex numbers x^2 = -9 x = ±√-9 x = ± 3i where i = √-1
Monday, October 8, 2007 at 12:44pm by Reiny
Algebra 2
If we restrict ourselves to positive integers, then subtraction does not have a closure property, for example: 5-7=-2 ∉ N. If we are dealing with real numbers, division does not have closure property, because we cannot divide by zero. On the other hand, non-zero real...
Saturday, September 3, 2011 at 10:27am by MathMate
algebra II
Odd question. a quadratic always has two solutions, real, or complex. The vertex can tell you if the solutions are real (sometimes a double solution, if the vertex is on the coordinate), or complex numbers.
Sunday, July 3, 2011 at 2:49pm by bobpursley
Calculus
First, to simplify things, observe that arctan can be expressed as a logarithm in terms of complex numbers. Suppose we have two different roots (complex or real), y1 and y2. Then: ax^2 + bx + c = A(x-y1)(x-y2) for some contant A We have: 1/[(x-y1)(x-y2)] = p[1/(x-y1) - 1/(x-y2...
Thursday, January 10, 2008 at 2:41pm by Count Iblis
Math
using only real numbers there is no factorization. Using complex numbers, 16x^2 + 49y^2 = (4x+7y i)(4x-7y i)
Tuesday, November 6, 2012 at 11:02pm by Steve
Math
Use the quadratic formula to solve the equation. x² - x = -2 Type an exact answer, using radicals as needed. Express complex numbers in terms of i. Use integers or fractions for any numbers in the expression. Use a comma to separate answers as needed.)
Sunday, April 24, 2011 at 10:07am by Mary
algebra2
an equation to degree n, has n roots. This is always true, never violated. Never. Now, if the range of the variables are over the Real Number set only, then some of the roots cannot be written because they exclude the actual roots, complex numbers. Example(X^2+1)=0 x^2=-1 x...
Wednesday, February 23, 2011 at 2:33pm by bobpursley
math
Simplify the following quotient of complex numbers into the form a + bi. -8-8i/1+2i
Wednesday, March 2, 2011 at 9:07pm by Jackster
Math
I Don't Know What Is This Subject Called In English But It's About Complex Numbers it says 25 = 16 - 9 i^2 = (4 ± 3i) But My Teacher Says 25 = 25 - 0 i^2 = (5 ± 0i) I Think My Teacher Is Wrong , The Result Is 25 But There Will Not Be Complex Number ...
Wednesday, October 5, 2011 at 6:59am by Jack
algebra2-imaginary numbers
You can add or subtract complex numbers by treating the i as a variable and combining like terms. I am having a lot of trouble figuring out these equations with imaginary numbers. 1. (3+2i)+(7-i)= 2.(1-6i)+(2-i)= 3. (2+i)-(3+i)= 4.(4+i)-(2-i)= Can someone please walk me ...
Tuesday, January 16, 2007 at 3:52pm by chrissy
math
i is an imaginary number. YOu can graph it only on the complex number plane. Consider a rectangular graph, the x axis is the real numbers, and the y axis is imaginary numbers. THen you plot the point (-3,4). Find the distance from the origin, it is 5.
Tuesday, February 2, 2010 at 10:23am by bobpursley
math URGENT!!!!
i have a list of 5 different numbers. the sum of 2 of the numbers is 0. the sum of 2 of the numbers is 1. the sum of 2 of the numbers is 2. the sum of 2 of the numbers is 3. the sum of 2 of the numbers is 4.the sum of 2 of the numbers is 5.the sum of 2 of the numbers is 6. the...
Monday, October 29, 2012 at 5:14pm by dan
Abstract Algebra
The elements of H are the complex numbers on the unit circle and if you multiply two of those you get another complex number on the unit circle, so the product of two elements of H is another element of H.
Friday, December 7, 2007 at 9:22am by Count Iblis
maths
There are 3 solutions with real numbers and 4 solutions with complex numbers
Monday, April 1, 2013 at 10:22am by Kim
Complex Number Proof
Prove: If Z and W are complex numbers, then the conjugate of (Z+W) is equal to the conjugate of Z plus the conjugate of W. My thought is that this is kind of like the distributive property, but I'm not sure. It doesn't help that I haven't written a proof in over 10...
Wednesday, June 11, 2008 at 4:38pm by Amy
algebra
Can someone please help me with these problems? Please and thank you. 1)Solve the equation: (1/x)+[x/(x+2)]=1 2)Simplify the complex fraction: 3-(3/4) ------- (1/2)-(1/4) (1/x)+ [x/(x+2)] = 1 Convert left side to the sum of fractional terms with common denominators. [(x+2) + x...
Sunday, May 13, 2007 at 11:28am by Lydia
Complex Numbers
You are welcome
Monday, January 31, 2011 at 9:03pm by helper
LAL!
are these complex sentence. if it is complex, and are the subordinate clause right are these right? the subordinate clause are in capital letters 1-IN THE 1950S the giants were the national league team from new york.( COMPLEX) 2- fans argued all the time about WHO WAS THE ...
Wednesday, May 12, 2010 at 3:56pm by Sara!
english/check please
Find the independent clauses and the dependent clauses.Write wether it is complex or compound-complex 1)Mr and Mrs Johnson play golf(ind) when the weather is warm.(dep)complex 2)What I would like is a vacation. independent,complex 3)Alicia works at the daycare center that is ...
Monday, April 30, 2012 at 11:37pm by joe
math complex numbers
add like components: 3+8-7 -2i=4-2i
Wednesday, November 17, 2010 at 8:45pm by bobpursley
math complex numbers
3 + 3i + 8 − 2i − 7
Wednesday, November 17, 2010 at 8:45pm by dmj
complex numbers
Thank you so much!!!
Tuesday, November 4, 2008 at 1:43pm by Mary
Calculus--complex numbers
thanks!
Thursday, March 13, 2008 at 7:11am by Anne---?
english
Write whether a sentence is simple, compound, complex, or compound-complex. 1-Mrs. Huang planned a party for Kim because she was graduating from high school. Complex 2=She invited Lisa,Elena,and Enrique to the party. Simple 3-Mr. Huang thought that kim's friends should ...
Tuesday, May 1, 2012 at 9:28pm by joe
English
When you are looking at a work by Monet, stand back at least fifteen or twenty feet. simple, compound, complex, compound-complex complex
Wednesday, November 17, 2010 at 9:58pm by Hayley
English
1)compound 2)complex 3)complex 4)compound complex 5)simple 6)simple 7)simple 8)simple 9)compound 10)compound 11)complex 12)complex 13)simple
Tuesday, November 9, 2010 at 2:10pm by Tom Jameson
chemistry
How to find moles given oxidation numbers and chemical formula? Trying to do my chemistry lab but i'm super duper stuck. please help me i'm gonna die. this is the part i'm stuck on: The overall charge on the complex, [Ni(en)(H2O)]^2+ * SO4^2- * H2O is zero; the ...
Thursday, November 15, 2012 at 12:37am by dr bob's number one fan
Algebra 2
When dealing with imaginary and complex numbers, are there 2 solutions? I.e.: x^2=4 x=2,-2 For: x^2=-4 x=2i or -2i ? (Is there a 2i and -2i, like for real numbers?)
Wednesday, October 24, 2012 at 1:00pm by Bart
maths-complex numbers
by using the substitution w = z^3, find all the solutions to z^6 - 8z^3 +25 = 0 in complex numbers, and describe them in polar form, using @(theta) to denote the angle satisfying tan@ = 3/4 ( note simply leave @ as it is, dont calculate it). i got up to z^3 = 4+3i and 4-3i ...
Monday, March 12, 2007 at 9:25am by Anonymous
MAth
How i change 315 grad in 7xpi/4? I have on Thuesday a exam in math but i dont no how i can convert 135 grad in in this form(how the example above). I need it for complex Numbers
Saturday, May 19, 2012 at 12:42pm by Deny
complex numbers
if 5i=yi, then y is 5 and if y is 5, x=y
Sunday, March 8, 2009 at 2:34pm by bobpursley
Calculus--complex numbers
thank you so much!!
Wednesday, March 12, 2008 at 4:09am by Anne
English
As it happens, you're right and I'm wrong. Tell if compound, complex, simple, compound-complex complex
Wednesday, November 17, 2010 at 9:45pm by Hayley
math
-3x +1 = -8x^2 -4x 8x^2 + x +1 = 0 x = (1/16) [-1 +/- sqrt (-33)] The two answers are complex numbers.
Wednesday, March 18, 2009 at 11:10pm by drwls
Algebra 2/Trig.
I forgot some stuff from my 7th grade algebra class about complex numbers...like what do you do with a problem like this 5+5i 3-i divided by + divided by 2-i 4+3i thanks.(divided by refers to dividing line in a fraction) In each case, RATIONALIZE the denominator. Here is the ...
Sunday, November 19, 2006 at 7:08pm by Tom
Sociology
6. President Eisenhower was a) A supporter of the military industrial complex b) The founder of the military industrial complex c) A general so he must be in favor of the military industrial complex d) Concerned that the military industrial complex would grow too big and ...
Sunday, September 16, 2012 at 7:38pm by Tammy
Math
i^6 = (i^2)^3 = (-1)^3 = -1 The square, not the square root of -1 is 1. :) B.t.w., can you prove that -1 times -1 is 1? Hint, try to prove first that for any number X: -1 times X equals -X How do you find the square root of -1? The square of any real number is alwayspositive. ...
Wednesday, November 15, 2006 at 3:37pm by Count Iblis
AiMS MATH
Natural numbers are the counting numbers, 1, 2, 3, etc Integers are the counting numbers, together with their opposites and zero. whole numbers are the counting numbers without the zero. Rational numbers are the set of all numbers that can be written as quotients, ie, 1/2. ...
Thursday, January 20, 2011 at 7:16pm by helper
math
How do I find a complex prisoner number for f(z)=z^2+3? I have tried all the numbers but they all seem to be going up
Tuesday, August 16, 2011 at 11:19pm by Chanee
algebra
I would use the standard quadratic formula for ax²+bx+c=0, and x=(-b±√(b²-4ac))/2a Here 4x^2 - 5x = -2 can be rewritten as 4x^2 - 5x + 2 =0, so a=4, b=-5 c=2 substituting in the quadratic formula, x=(-(-5)±√((-5)&...
Tuesday, June 8, 2010 at 8:42am by MathMate
Maths
almost sinx = cos(pi/2 - x) and cosx = sin(pi/2 - x) that is, the sine of any angle equals the cosine of its compliment. so sinx - i cosx = cos(pi/2 - x) - i sin(pi/2 - x) = cis(pi/2 - x) this webpage has some good examples with simple diagrams to show your topic http://www....
Wednesday, March 4, 2009 at 2:44am by Reiny
Algebra 2
For any polynomial of odd degree, large negative values of x yield large negative values for y. Same for positive values. So, somewhere along the way, y must change from negative to positive, meaning there is at least one real root. Now, it's quite possible that there is ...
Saturday, May 18, 2013 at 9:22am by Steve
Math Analysis
There is a proof that all complex roots of a polynomial equation with real constants will be complex conjugates to each other. Therefore the answer is 2-i and 3+2i.
Sunday, January 27, 2008 at 1:07am by drwls
algebra
x^2+225 ..factor over complex numbers?
Tuesday, April 6, 2010 at 11:57pm by mada
complex numbers
find the values of x and y x+5i=y+yi
Sunday, March 8, 2009 at 2:34pm by Lou
AiMS MATH
-5 Is A Member Of Which Subset Of Real Numbers. a) natural numbers b) whole numbers c) intergers d) rational numbers e) irrational numbers
Thursday, January 20, 2011 at 7:16pm by Angel
Math/Algebra
Find the x-intercepts of f(x)=4x^2-20. Give an exact answer using radicals as needed. Rationalize all denominators. Express complex numbers in terms of i.
Friday, March 6, 2009 at 9:35am by Kelly
Grade 12 Data Management math
I will translate and let you make the attempts: a) ℚ is the set of rational numbers, which can be obtained as the quotient of two integers. This includes fractions, decimal numbers (repeating or not), and all integers. So (3/4) ∈ ℚ is true or not? ...
Thursday, March 24, 2011 at 3:17pm by MathMate
algebra
x^2+225 ... factor expression over the complex numbers?
Wednesday, April 7, 2010 at 12:00am by mada
Calculus
two complex numbers Z and W are related by the formula W=(Z+1)/(1-Z) what is W if Z=1.5i? thanks for the help!
Thursday, March 13, 2008 at 7:15am by Anne
college algebra--need help please!!
From the given zeros, factors would be (x+6) , (x-6-i) and (x-6 + i) the complex factors simplify to x^2 -12x +37 (complex numbers always appear in conjugate pair form) but that would only produce a cubic, so there has to be multiplicity of the above zeros. two options : f(x...
Friday, November 23, 2012 at 2:59pm by Reiny
Math
Since I don't know how many numbers are on a roulette wheel: Odd numbers/all numbers Green numbers/all numbers (Red and Green numbers)/all numbers If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of ...
Friday, March 1, 2013 at 10:44am by PsyDAG
Math
We have to simplify complex numbers and I was wondering whether I did these problems correctly. 1. 4i^2-2i^3 = -4+2i 2. (-i)^3 = i 3. (the square root of a -2)^6= -8 4.1/(2i)^3 = i/8
Sunday, December 16, 2007 at 2:53pm by Bethany
math problem
If you're working in complex numbers, don't forget that there are three solutions to the cubic equation x©ø = -1. x = -1 is one of them; the other two are x = (1 + ¡î3i) / 2 and x = (1 - ¡î3i) / 2, since if you cube either of these ...
Saturday, March 10, 2012 at 9:59pm by David Q/R
math
i've got another problem the question is which counting numbers are also whole numbers i read this part in my book (the set of whole numbers does not include any numbers less then zero) so would it mean the numbers 1- 9 that are the whole numbers
Monday, August 17, 2009 at 5:42pm by Amber
English
Please check my work. Identify whether each sentence is complex, an exclamation, declarative, or interrogative. 1. Tim likes soup, so Mary bought tomatoes. ----- Complex 2. Oh no! ----- Exclamation 3. Do you want to play in the Garden? ----- Interrogative 4. In the story, the ...
Wednesday, July 20, 2011 at 9:34am by Priya
English
Please check my work. Identify whether each sentence is complex, an exclamation, declarative, or interrogative. 1. Tim likes soup, so Mary bought tomatoes. Complex 2. Oh no! Exclamation 3. Do you want to play in the Garden? Interrogative 4. In the story, the author told how ...
Wednesday, July 20, 2011 at 12:32am by Priya
math
7 * 7 = 49cm^2 However, that will only be true, if your "complex figure" is a square. If it is more complex than that, you need more data.
Thursday, May 13, 2010 at 4:27pm by PsyDAG
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