Friday

July 31, 2015

July 31, 2015

Number of results: 10,403

**math-complex numbers**

Sketch the sets of complex numbers in the complex plane that satisfy the following: a) |z-1|=2 b) |z-3i|=2 c) |z-5+2i|=2 I'm not sure, but are you supposed to rearrange the whole thing to |z|=a+bi? So, part b would be |z|=2+3i.
*October 9, 2013 by Rin-chan-san*

**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?
*October 27, 2010 by Jeida *

**Pre-cal **

The equation of the line joining the complex numbers -5 + 4i and 7 + 2i can be expressed in the form az + b*overline{z} = 38 for some complex numbers a and b. Find the product ab. Any help?
*September 1, 2014 by Sam*

**Precalculus**

Let z and w be complex numbers such that |2z - w| = 25, |z + 2w| = 5, and |z + w| = 2. Find |z|. I need a little help with absolute values on complex numbers.
*August 16, 2014 by Aditya*

**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?
*May 9, 2013 by Mahler*

**Complex Numbers**

The system of equations |z - 2 - 2i| = \sqrt{23}, |z - 8 - 5i| = \sqrt{38} has two solutions z1 and z2 in complex numbers. Find (z1 + z2)/2. Im really just plain old confused. Could anyone help me out?
*August 13, 2014 by Aditya*

**Complex numbers**

Prove algebraically that |w+z| is less than or equal to |w|+|z| for any complex numbers w and z, where || is the magnitude. After letting w = a+bi and z = c + di and doing some plugging in etc. I got that ac-bd <= b^2 + sqrt (a^2+b^2)(c^2+d^2) + d^2 But is my proof complete...
*January 2, 2014 by Cambridge*

**Complex numbers - quadratic formula**

Let a and b be real numbers. The complex number 4 - 5i is a root of the quadratic z^2 + (a + 8i) z + (-39 + bi) = 0. What is the other root? I did a lot of work on hand and with wolfram alpha but it doesn't simplify itself easily at all....anyone have any help to offer? Thanks
*January 9, 2014 by Cambridge*

**Math**

"The conjugate of the sum of two complex numbers is equal to the sum of the conjugates of the two complex numbers." This is true right?
*February 19, 2015 by Jay*

**Calculus--complex numbers**

the complex number Z satisfies Z/(Z+4)= 3+2i Find Z. please help thx!
*March 13, 2008 by Anne*

**complex numbers**

the complex number Z satisfies Z+i/(1+2i)= iz Find Z. please help thx!
*November 4, 2008 by Mary*

**complex numbers**

the complex number Z satisfies (Z+i)/(1+2i)= iz Find Z. please help thx!
*November 4, 2008 by Mary*

**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 + ...
*February 13, 2007 by Jake*

**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
*June 9, 2012 by wendell*

**Pre-calculus **

Let z and w be complex numbers such that |2z-2|=25, |z+2w|=5, and |z+w|=2. Find |z|. I first squared both equations and expressed the square of the magnitudes in terms of the complex numbers and its conjugates. Next, I summed the equations together and attempted to solve for |...
*February 16, 2015 by majorbill*

**precalculus**

The equation of the line joining the complex numbers -5 + 4i and 7 + 2i can be expressed in the form az + b \overline{z} = 38 for some complex numbers a and b. Find the product ab. I can get the equation of the line by slope intercept but I don't know how to do this in the ...
*September 6, 2014 by Jamie*

**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.
*December 7, 2007 by Devin*

**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
*October 7, 2010 by natali*

**masterin quantum **

Consider the left shift operator on the space of infinite sequences of complex numbers: L(z1,z2,…)=(z2,z3,…). Is L injective? Yes <text> Yes</text> - incorrect No Is L surjective? Yes <text> Yes</text> - correct No Find the eigenvalues and eigenvectors ...
*April 6, 2015 by JuanPro*

**math-complex numbers**

If z = -3+4i, determine the following related complex numbers. a)vector z b)3(vector z) c) 1/(vector z) d) |z| e) |vector z| f) (vector z)/(|z|^2)
*October 11, 2013 by Rinchan*

**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?)
*October 24, 2012 by Bart*

**algebra, math**

How many ordered triples of complex numbers(a,b,c) are there such that a^3- b,b^3-c,c^3-a are rational numbers, and a^2(a^4+1)+b^2(b^4+1)+c^2(c^4+1)=2[{(a^3) b}+{(b^3)c}+{(c^3)a}]
*October 11, 2013 by pls help quickly *

**ALGEBRA**

How many ordered triples of complex numbers(a,b,c) are there such that a^3-b,b^3-c,c^3-a are rational numbers, and a^2(a^4+1)+b^2(b^4+1)+c^2(c^4+1)=2[{(a^3) b}+{(b^3)c}+{(c^3)a}]
*October 11, 2013 by boss*

**ALGEBRA**

How many ordered triples of complex numbers(a,b,c) are there such that a^3-b,b^3-c,c^3-a are rational numbers, and a^2(a^4+1)+b^2(b^4+1)+c^2(c^4+1)=2[{(a^3) b}+{(b^3)c}+{(c^3)a}]
*October 11, 2013 by algebra,math*

**math**

How many ordered triples of complex numbers(a,b,c) are there such that a^3- b,b^3-c,c^3-a are rational numbers, and a^2(a^4+1)+b^2(b^4+1)+c^2(c^4+1)=2[{(a^3) b}+{(b^3)c}+{(c^3)a}]
*October 11, 2013 by frm*

**math**

How many ordered triples of complex numbers(a,b,c) are there such that a^3- b,b^3-c,c^3-a are rational numbers, and a^2(a^4+1)+b^2(b^4+1)+c^2(c^4+1)=2[{(a^3) b}+{(b^3)c}+{(c^3)a}]
*October 11, 2013 by plss answer fast*

**math**

solve and simplify the answer completely by using pure imaginary numbers/complex numbers. 2x^2+3x+2=0
*December 4, 2008 by anonymous*

**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 ...
*January 16, 2007 by chrissy*

**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 ...
*March 12, 2007 by Anonymous*

**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 ...
*December 28, 2012 by Fate*

**English**

Choose the term that describes the type of sentence shown. If you are in line early, you'll be sure to get the best tickets. A.) compound-complex B.) complex C.) compound D.) simple I think it is C? John was late to dinner and I was late to the movies. A.) simple B.) complex C...
*December 16, 2013 by Cassie*

**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 charge on ...
*November 15, 2012 by dr bob's number one fan*

**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...
*May 13, 2007 by Lydia*

**Quick english help**

Please check & see if I classified these sentences as simple, complex, or compound correctly! 1. His tie is going to choke him unless we can get it off. (Is this a complex sentence?) 2. She laughed so hard until the teacher told her to stop. (Is this a complex sentence?) 3. ...
*December 14, 2014 by Anonymous*

**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 years. Help...
*June 11, 2008 by Amy*

**Language arts check answers**

If you fail to plan, you plan to fail. simple complex compound <----My choice compound-complex I was thinking about meeting Susan for dinner and then we could go shopping. compound simple complex <----My choice compound-complex Strawberries and bananas are my two ...
*January 7, 2015 by Sandy*

**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
*January 31, 2012 by Chelsea*

**can someone please help me?**

simplify the following expressions involving complex numbers. (3+2i)-(-7-i) 10 + 3i how did you do that? can you show me this one and explain how this time? (3+2i)(-7-i) or even (3-2i)^2 you would do 3+2i=5i, then -7-i=7i then 5i+7i=12i (3+2i)-(-7-i) = (3+2i) + (7 + i) = 3 + 7...
*January 18, 2007 by Shay*

**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 Because ( 0i = 0) So Is My ...
*October 5, 2011 by Jack*

**complex numbers**

1) 4b-5t(-a-3)i=7-8i 2) (7+4i) - (l+2i) 3) (3+2i) (-2+4i)
*October 14, 2014 by anonymous*

**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 ...
*November 19, 2006 by Tom*

**Trigonometry**

complex numbers
*December 8, 2013 by steve*

**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 ...
*April 30, 2012 by joe*

**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 ...
*May 12, 2010 by Sara!*

**complex numbers**

find the values of x and y x+5i=y+yi
*March 8, 2009 by Lou*

**math b**

divide complex numbers: 2+3-3i^3/1-i
*April 1, 2009 by annaiiz*

**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 come to...
*May 1, 2012 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
*November 17, 2010 by Hayley*

**English**

Are these sentences compound, complex, or compound complex? Volunteer helped clear roads so that supplies could get to villages that needed them. Complex..
*March 29, 2015 by Kelley*

**Math**

simplify (8 – i) – (4 – i) using Complex Numbers
*September 7, 2011 by Peter*

**Math**

Factor over {complex numbers} 9x^2 + 49
*April 9, 2012 by Nathan*

**Precal**

Prove algebraically that |w+z|<=|w|+|z| for any complex numbers w and z.
*August 16, 2014 by Josh*

**Trig/Precalc**

The system of equations: |z-2-2i|=sqrt(23), |z-8-5i|=sqrt(38) has two solutions z_1 and z_2 in complex numbers. Find (z_1+z_2)/2. My first instinct on this problem was to square each equation given that the square of the magnitude of a complex number is much easier to deal ...
*February 16, 2015 by majorbill*

**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!
*March 13, 2008 by Anne*

**math b**

last question finally simplify complex numbers: i^16/i^3
*April 1, 2009 by annaiiz*

**algebra**

x^2+225 ..factor over complex numbers?
*April 6, 2010 by mada*

**math**

Simplify the following product of complex numbers. (8 + i) • (-4 – 3i)
*March 2, 2011 by Jackster*

**maths**

compplex numbers multiplying complex and not: 3*(6-j8) also, 3+(6-J8)
*May 5, 2014 by jerome*

**math**

For what real values of x and y are the numbers -3+i^2y and x^2+y+4i are conjugate complex
*June 6, 2014 by haritha*

**Algebra **

Find all complex numbers such that z^2=2i. Thank you!
*October 26, 2014 by Trish Goal*

**English**

As it happens, you're right and I'm wrong. Tell if compound, complex, simple, compound-complex complex
*November 17, 2010 by Hayley*

**algebra**

x^2+225 ... factor expression over the complex numbers?
*April 7, 2010 by mada*

**intermediate algebra**

Simplify the following product of complex numbers (-10+3i)*(-2)
*July 9, 2011 by swirl*

**division of complex numbers**

(1-2i)/(2+3i) Do I multiply both the numerator and denominator by 2+3i?
*January 16, 2012 by lola*

**Algebra 2**

More About Complex Numbers Find the reciprocal. -1-i 2i
*November 18, 2014 by Alicia*

**Math**

Find all solutions for the complex numbers: a) z^4 = 9i -46 b) 8*sqrt3 / z^4 +8 =+i
*February 14, 2015 by Complex number*

**Algebra**

Find all complex numbers $z$ such that \[ |z|^2-2\bar z+iz=2i. \]
*June 18, 2015 by XXX*

**Chemistry**

8-hydroxyquinoline (Q) can complex and precipitate many metals. A mixture of the aluminium and magnesium complexes weighed 1.0843g (MW=459.43; 312.61). When ignited, the mixture decomposed and left a residue of Al203 (MW 101.96) and MgO (MW 40.304) weighing 0.1344g. What is ...
*August 24, 2014 by David*

**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.)
*April 24, 2011 by Mary*

**calculus**

find the modulus and the argument of the following complex numbers: 15-4i and a-ai where a is greater than 0
*February 20, 2008 by Courtney*

**math**

Simplify the following quotient of complex numbers into the form a + bi. -8-8i/1+2i
*March 2, 2011 by Jackster*

**algebra**

Find the exact solutions to the quadratic equation in the complex numbers. (x-13)²=-36
*July 1, 2011 by Kevin Smith*

**algebra2**

simplify the following quotient of complex numbers into the form of a+bi -9+8i/1+2i
*March 5, 2012 by melba*

**English**

Is this sentence compound, complex, or compound complex? Charity groups distributed food and safe drinking water, and they handed out sleeping bags and mosquito nets, which were needed in the tropical climate. Is this compound complex?
*March 29, 2015 by Kelley*

**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 ...
*July 20, 2011 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 ...
*July 20, 2011 by Priya*

**Algebra II**

Find the exact solutions to the quadratic equation in the complex numbers. (x-13)²=-36 HELP ME PLEASE!
*July 1, 2011 by hot*

**Algebra II**

Please help me! Find the exact solutions to the quadratic equation in the complex numbers. (x-13)²=-36
*July 3, 2011 by Reanna*

**intermediate algebra**

Simplify the following quotient of complex numbers into the form a+bi 1+8i ---- -6+i
*July 9, 2011 by swirl*

**maths (complex numbers)**

if b is a real number satisfying b^4 + 1/(b^4) = 6, find the value of :- (b + i/b)^16 where i = sqrt of -1
*October 26, 2011 by ...........*

**maths**

Find the number of different ordered quadruples (a,b,c,d) of complex numbers such that a^2=1 b^3=1 c^4=1 d^6=1 a+b+c+d=0
*April 1, 2013 by stranger*

**Complex numbers**

If f(x) is a polynomial with real coefficients such that f(4+3i)=31+16i, then f(4−3i)=a+bi. What is the value of a+b
*May 24, 2013 by Tony *

**Math**

Find the real and imaginary parts of the following complex numbers: (i) 1.5e^jπ/4 (ii) je^1.2 + j^2 e
*April 10, 2014 by Mat*

**5th grade Language Arts**

I need help classifying sentences (compound, complex, compound-complex). Here's the sentence: I got in trouble so I can't go to the party, but it would have been fun. I answered it was complex which I got wrong.
*November 26, 2012 by Alex*

**Chem 100**

CHemical formula names a. Name either the complex, or given the name of the complex, write the formula for the complex I. Fe[AlF6] II. tetracarbonylplatinum(IV) chloride III. [CrBr(H2O)(en)2]Cl2 IV. K3[Fe(CN)6] I have really no idea how to do this
*May 21, 2015 by Mall*

**check my work please!**

ok i have to divide complex numbers: question is: 1-2i+i^3/1+i this is what i did: 1-2i+i(-i)/1+i 1-2i-i^2/1+i 1-2i-i(-1)/1+i 1-2i+i/1+i 1-3i/1+i*1-i/1-i 1-i-3i+3i^2/1-i+i-i^2 1-i-3i+3(-1)/1-i^2 1-i-3i-3/1-(-1) 1-4i-3/2 -2-4i/2 my answer is -2i-1 is that right?
*April 1, 2009 by annaiiz*

**Pre calculus **

Please help me! Find the exact solutions to the quadratic equation in the complex numbers. (x-13)²=-36
*July 3, 2011 by HELP*

**MATH**

The quadratic equation x2 + mx + q = 0, where m and q are real numbers, has the complex root a + bi. Which of the following must be equal to m?
*October 1, 2013 by Anonymous*

**Algebra 2**

More About Complex Numbers Multiply (4+3i)(1-i) Please show work i need help
*November 18, 2014 by Alicia*

**Algebra 2**

More About Complex Numbers Multiply (4+3i)(1-i) Please show work i need help
*November 18, 2014 by Alicia*

**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
*December 16, 2007 by Bethany*

**Precalc, i really don't get my hw**

how do i do this? factor x^4-x^2-20 over real and complex numbers I tried to do synthetic, but it doesnt work.=(
*October 14, 2008 by Samya*

**Algebra 2**

"The Discriminant; Equations in Quadratic Form" Solve over the complex numbers. 1/e + 1/(square root of e) - 6 = 0
*January 3, 2010 by Mary*

**Algebra**

Multiply. x-(6+2i)][x-(6-2i)] Note that these expressions contain complex numbers. Simplify your answer as much as possible.
*January 23, 2011 by Rachal*

**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. ...
*November 15, 2006 by Count Iblis*

**complex numbers and imaginary units**

2i/1+i your question probably says 'simplify' multiply top and bottom by (1-i)\(1-i) and remember that i^2 =-1 so... 2i/(1+i) * (1-i)\(1-i) = (2i - 2i^2)/(1-i^2) = 2(i-i^2)/(1+1) =i+1
*May 23, 2007 by candace*

**math help people lik really desperate!!**

ok i have to divide complex numbers: question is: 1-2i+i^3/1+i this is what i did: 1-2i+i(-i)/1+i 1-2i-i^2/1+i 1-2i-i(-1)/1+i 1-2i+i/1+i 1-3i/1+i*1-i/1-i 1-i-3i+3i^2/1-i+i-i^2 1-i-3i+3(-1)/1-i^2 1-i-3i-3/1-(-1) 1-4i-3/2 -2-4i/2 my answer is -2i-1 is that right?
*April 1, 2009 by annaiiz*

**English-Grammar**

Although he was born in Scotland, he became a hero of the American Revolution. simple sentence compound sentence complex sentence (my answer) compound complex sentence His ship was badly managed, but Jones refused to give up. simple sentence (my answer) compound sentence ...
*December 11, 2012 by Anon *

**Math - Complex Numbers**

Could someone show me how to get the work for: 3/4 (sqrt)-16/25 ? The answer says 3/5i. Could anybody tell me how to get there and work with complex fractions and simplify them? Thanks! 3/4 SQRT(-16/25) 3/4 SQRT( 16/25*-1) 3/4 *4/5 *SQRT( -1) but the sqrt of -1 is defined as i...
*May 8, 2007 by Danielle*

**precal 2 **

find the cube roots of the complex numbers -4square root 2(1-i) and write them in both the standard and trigonometric forms.
*July 31, 2011 by qui qui *