# Math - complex numbers

144,527 results

### 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.

### 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 don't know what they are. Can you help me?

### 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?

### Math (Complex Numbers)

how does one go about solving something such as: conjugate(z+2-3i) = z+5+10i Conjugates of actual complex numbers are very simple, but the inclusion of z trips me up

### Math... with complex numbers

Complex numbers are often used when dealing with alternating current (AC) circuits. In the equation V = IZ, V is voltage, I is current, and Z is a value known as impedance. If V = 1+i and Z=2-$, find I.

### 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?

### 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.

### Complex Numbers

Let z and w be complex numbers such that |z| = |w| = 1, and zw is not equal to -1. Prove that (z + w)/(zw + 1) is a real number.

### Complex Numbers

Let z and w be complex numbers such that |z| = |w| = 1, and zw is not equal to -1. Prove that (z + w)/(zw + 1) is a real number.

### Precalc

To which set(s) of numbers does the number sqrt -16 belong? Select all that apply. real numbers complex numbers*** rational numbers imaginary numbers*** irrational numbers I can only pick two, and that's what I think it is. Please check? Thanks

### 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?

### 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?

### Algebra II

PLEASE HELPPPPPP What are the possible numbers of positive, negative, and complex zeros of f(x) = x4 + 3x3 − 2x2 + 1? (6 points) Positive: 2 or 0; negative: 2 or 0; complex: 4, 2, or 0 Positive: 2, or 0; negative: 4, 2 or 0; complex: 4, 2, or 0 Positive: 2 or 0; negative: 2 ...

### 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...

### Mathematics-Complex Numbers

Question: If z1 , z2 ,z3 are complex numbers and |z1|=|z2|=|z3|=1 and (z1)^3+(z2)^3 + (z3)^3 +z1*z2*z3=0 find the maximum and minimum values of |z1+z2+z3|. My thoughts on the question: Let z1=a , z2=b and z3= We know that |a+b+c| <= |a| + |b+c| |a|=1 So |a+b+c|<= 1 + |b+...

### 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

### Calculus--complex numbers

the complex number Z satisfies Z/(Z+4)= 3+2i Find Z. please help thx!

### complex numbers

the complex number Z satisfies Z+i/(1+2i)= iz Find Z. please help thx!

### complex numbers

the complex number Z satisfies (Z+i)/(1+2i)= iz Find Z. please help thx!

### 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}]

### 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}]

### 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}]

### math

solve and simplify the answer completely by using pure imaginary numbers/complex numbers. 2x^2+3x+2=0

### 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)

### 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 + ...

### 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

### 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 |...

### 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 ...

### 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.

### 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

### Maths-Complex numbers

If z is any complex number where |z|=1,show that using the Argand plane 1<= |z+2|<=3 and (-pi/6)<= arg(z+2)<= (pi/6)... I know if we take z=x+iy |z|= root(x^2+y^2) so |z+2|=root[(x+2)^2 +y^2] I don't see a way to proceed

### 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 ...

### Math

Complex numbers 5i+7i x i

### 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

### 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?)

### 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}]

### 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}]

### math b

divide complex numbers: 2+3-3i^3/1-i

### Math

complex numbers: Evaluate z=(-j 3/4)^-j^3/4

### Math

Dividing complex numbers 4-2i/3+1

### 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...

### 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 ...

### Math

simplify (8 – i) – (4 – i) using Complex Numbers

### Math

Factor over {complex numbers} 9x^2 + 49

### Math

Dividing complex numbers 7-13i/2i

### math real and complex numbers lesson

(7,-9)+(3,5)

### math

What is the product of the complex numbers (-3i+4) and (3i+4)? I've forgotten how to do this...

### 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...

### math b

last question finally simplify complex numbers: i^16/i^3

### math

Simplify the following product of complex numbers. (8 + i) • (-4 – 3i)

### math

For what real values of x and y are the numbers -3+i^2y and x^2+y+4i are conjugate complex

### Math

Find all solutions for the complex numbers: a) z^4 = 9i -46 b) 8*sqrt3 / z^4 +8 =+i

### Math

Complex Numbers please helpppppp and show solutions 1.) (3-7i) + (-1-2i) 2.) (4-5i) - (2-3i) 3.) (7-5i) + (6+9i) 4.) 2+3i/3-5i

### Roots, complex numbers

I want to solve z^5=-1 But all the examples I've seen use positive numbers. The -1 is throwing me off somewhat. Most of the examples I've worked with would be solved using the polar form I.e Z^5(cos5+i sin5)=1(cospi +i sinpi) But as I said negative numbers I'm finding confusing.

### math

Simplify the following quotient of complex numbers into the form a + bi. -8-8i/1+2i

### Math

Let z and w be complex numbers such that |z| = |w| = 1, and zw is not equal to -1. Prove that (z + w)/(zw + 1) is a real number.

### 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, don't calculate it). i got up to z^3 = 4+3i and 4-3i ...

### 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 ...

### 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...

### Math

Find the real and imaginary parts of the following complex numbers: (i) 1.5e^jπ/4 (ii) je^1.2 + j^2 e

### Math

x^2+√2x+1/2=0 Solve using the quadratic formula and use complex numbers.

### 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 ...

### 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?

### 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.)

### 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. ...

### 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...

### 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

### 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...

### 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 ...

### 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?

### 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 ...

### complex numbers

1) 4b-5t(-a-3)i=7-8i 2) (7+4i) - (l+2i) 3) (3+2i) (-2+4i)

### English

The basket (that she is holding) is made from palm fronds. independent clause adjective clause adverb clause noun clause If you fail to plan, you plan to fail. simple complex compound compound-complex John was late to dinner and I was late to the movies. simple complex ...

### math

Sketch the sets of complex numbers that would satisfy the following equation: |z| > 3 Explain in detail how the graph will look like. Thanks.

### Math

Solve the following equation with complex numbers and the quadratic formula : 7x^2-4x+2=0 My answer is 4+- 2i√10 ________ 14 My only question is Can this be reduced ?

### 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 ...

### Trigonometry

complex numbers

### 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 ...

### 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...

### complex numbers

find the values of x and y x+5i=y+yi

### English

When you are looking at a work by Monet, stand back at least fifteen or twenty feet. simple, compound, complex, compound-complex complex

### 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...

### English

Are these sentences compound, complex, or compound complex? Volunteer helped clear roads so that supplies could get to villages that needed them. Complex..

### English

In the following sentence are they compound, complex, or compound complex All girls were taught spinning when they were quite young, and they also learned weaving. I think compound complex While housewives were at the marketplace, they met at the public fountain, and young ...

### Precal

Prove algebraically that |w+z|<=|w|+|z| for any complex numbers w and z.

### 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 ...

### MAth

How i change 315 grad in 7xpi/4? I have on Thuesday a exam in math but i don't no how i can convert 135 grad in in this form(how the example above). I need it for complex Numbers

### 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. ...

### 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.

### precalculus, complex numbers

Let $\omega$ be a complex number such that $\omega^7 = 1$ and $\omega \neq 1$. Let $\alpha = \omega + \omega^2 + \omega^4$ and $\beta = \omega^3 + \omega^5 + \omega^6$. Then $\alpha$ and $\beta$ are roots of the quadratic \[x^2 + px + q = 0\] for some integers $p$ and $q$. ...

### 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

### 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!

### algebra

x^2+225 ..factor over complex numbers?

### maths

compplex numbers multiplying complex and not: 3*(6-j8) also, 3+(6-J8)

### Algebra

Find all complex numbers such that z^2=2i. Thank you!

### Mathematics - Complex numbers

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### English

As it happens, you're right and I'm wrong. Tell if compound, complex, simple, compound-complex complex

### 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 ...

### math

simplify the following expressions involving complex numbers. (3+2i)-(-7-i) is i like x? and how would this work i know that you do this: (3+2i)(7+i) to get rid of the sign between the expressions. but then what?