Questions on Algebra: Complex Numbers answered by real tutors!

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Algebra: Complex Numbers

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Question 80264: I hope you can help me with this question: 4+3i divided by 5+3i expressed in the form a+bi.
Thanks
Click here to see answer by jim_thompson5910(13787)

Question 80436: Write each expression as a complex number in the form of a + bi
5i - sq rt of -84
Thank you
Click here to see answer by tutorcecilia(2042)

Question 80485: what is an equivalent form of 2/3+ i? my four options are 3-i/4, 3-i/5, 4-i/4 and 4-i/5. please help i have no idea how to do this problem!!!
Click here to see answer by jim_thompson5910(13787)

Question 80922: I need your help with this question
Click here to see answer by checkley75(3666)

Question 80925: Answer this question too please
Click here to see answer by sofiyacherni(99)

Question 80924: I also need your help with this question
Click here to see answer by sofiyacherni(99)

Question 82649: Add or subtract complex numbers as indicated:
(3-2i)-(4-3i)

(4-2i)+(-50+3i)
Click here to see answer by jim_thompson5910(13787)

Question 82648: Add or subtract complex numbers as indicated:
(3-2i)-(4-3i)

(4-2i)+(-50+3i)
Click here to see answer by ssonygill(12)

Question 82729: Please sove 4x^2-6x+2=0
Click here to see answer by checkley75(3666)

Question 82729: Please sove 4x^2-6x+2=0
Click here to see answer by rapaljer(3616)

Question 82736: find the x-interceps and the vertex of the parabola described by the following quadratic function:
f(x)=2x^2-20x+6
Click here to see answer by vertciel(183)

Question 82775: multiply
(-1+2i)^2.
& if you can could you please show me how to plot the product on the complex plane?...if you can.
Click here to see answer by stanbon(26259)

Question 82827: i need someone to explain the steps to me in basic 'math for dummies' that my teacher is not able to do. the equation is:
x+4/x-4>_2 its one of those greater or equal to things. now, i am thinking that if i put the 2 on the other side with the equation and set it to >_0 then i can possibly graph it and get the places where it is zero on the graph. is this the way that it should be worked, am i close?
Click here to see answer by stanbon(26259)

Question 83034: Solution to the problem: x^3-5x^2-7x+51
answer choices:
4+i, 4-i
4i, -4i
4, -4
4+i, 4-i
Click here to see answer by Edwin McCravy(2920)

Question 83176: What is The square root of 2x-1= x-3
Click here to see answer by checkley75(3666)

Question 83863: m^4 - 10m^2 + 9 = 0
Click here to see answer by stanbon(26259)

Question 83890: 4t-t=6 + t <---- how do u do this?!?!?!
Click here to see answer by checkley75(3666)

Question 83950: Perform the indicated operation. Write the result in the form a + bi Show work.
(6 + 8i) - (-7 + i)
Click here to see answer by bucky(1732)

Question 84240: Find all the solutions of the equation and express in the form a + bi
3x - i = 5 + 2i
Click here to see answer by Edwin McCravy(2920)

Question 84423This question is from textbook Algebra 2
: factor completely 3x^3-81This question is from textbook Algebra 2

Click here to see answer by tutorcecilia(2042)

Question 84442: Solve
-4t>2
Click here to see answer by bucky(1732)

Question 84871This question is from textbook Elementary and intermediate Algebra
: Find all real or imaginary roots of 5x^2 + 5x + 4 = 0.
(If there is more than one root, show additional roots
This question is from textbook Elementary and intermediate Algebra

Click here to see answer by jim_thompson5910(13787)

Question 84869This question is from textbook Elementary and intermediate Algebra
: Solve y^4 = -2 where y is a real number.
Simplify your answer as much as possible.
This question is from textbook Elementary and intermediate Algebra

Click here to see answer by rapaljer(3616)

Question 84867This question is from textbook Elementary and intermediate Algebra
: Please assist I have been working on this for four days now and cannot make any progress.
Write 4u/9cd - 2c^3z^2/3ad^2 as a single rational expression

This question is from textbook Elementary and intermediate Algebra

Click here to see answer by rapaljer(3616)

Question 85258: can i get to know the meaning and definition of algebra.please dont give a very complicated one which i wont be able to understand.i m 8th standard.
Click here to see answer by checkley75(3666)

Question 85699: What is the Square root of -7 minus the square root of -100?
My answer is "i square root of 7 minus 10i". Is this correct or can this problem be factored more?
Thank you!
Click here to see answer by stanbon(26259)

Question 85726: A driveway has an incline of 3m over a distance of 20m What is the angle of elevation of the driveway?
Click here to see answer by ankor@dixie-net.com(6691)

Question 85808: Write the expression 8+4i/7+i in the form a+bi
I have tried multiply the equation by (7-i) but the answer doesn't work out.
Click here to see answer by stanbon(26259)

Question 86187: what is the argument of;(1+i)(root3+i)
Click here to see answer by stanbon(26259)

Question 86333: Hello,
This question is not about complex numbers but I could not find any other catagory to put it under. It's solving problems by using first-degree open sentences. The question is, "Find three consecutive even numbers whose sum is
-90"
Click here to see answer by ankor@dixie-net.com(6691)

Question 86641: what is the value of i+56i^9
Click here to see answer by dolly(163)

Question 87227: how to apply complex number to de moviers theorem
Click here to see answer by Edwin McCravy(2920)

Question 87260: find the value of the complex number
Click here to see answer by jim_thompson5910(13787)

Question 87259: Find the absolute value of the following complex number: z=2+5i
Click here to see answer by longjonsilver(2297)

Question 87261: Determine the rectangular form of the following complex number:
z=7(cos 3pi/2 + i sin 3pi/2)
Click here to see answer by Edwin McCravy(2920)

Question 87511: This question is really troubling me and i could use some help please. Given that “e” is a complex number, solve e + 6ē = 7 (note: ē is the complex conjugate of e)

Click here to see answer by stanbon(26259)

Question 87991: S=2(pie)(r)(h) + 2(pie)(r^2)
Solve for h
Click here to see answer by tutorcecilia(2042)

Question 88097: Write each complex number in rectangular form. If necessary, round to the nearest tenth:
7(cos 3pi/2 + i sin 3pi/2)
Thanks for your help :)
Click here to see answer by jim_thompson5910(13787)

Question 88099: Use DeMoivre's Theorem to find the indicated power of the complex number. Write the answer in rectangular form:
[1/2(cos pi/10 + i sin pi/10)]^5
Click here to see answer by rapaljer(3616)

Question 88220: How do you simplify completely this complex fraction?
[(a+1/a-1)+1 / (a+1/a-1)-1]^5
Click here to see answer by rossiv53(27)

Question 88214: hi there, dont know where to start with this one, I dont know whether to use complex conjuate or use transposition of formula, any help would be greatly appreciated.
I need to find expressions for R6 and L in terms of R1, R2, R3, R4, R5 AND C given that the freq is one rad per second. w=freq
(R1-j/wC)/(R4+R5) = (R2+R3)/(R6+jwL)
thankyou
Click here to see answer by stanbon(26259)

Question 88283: hi there, posted the problem below before but forgot a part of it,
by equating real and imaginary parts find expressions for R6 and L in terms of R1, R2, R3, R4, R5 AND C given that the freq is one rad per second. w=freq
(R1-j/wC)/(R4+R5) = (R2+R3)/(R6+jwL)
thanks
Click here to see answer by bucky(1732)

Question 88209: hi there, dont know where to start with this one, I dont know whether to use complex conjuate or use transposition of formula, any help would be greatly appreciated.
I need to find expressions for R6 and L in terms of R1, R2, R3, R4, R5 AND C given that the freq is one rad per second. w=freq
(R1-j/wC)/(R4+R5) = (R2+R3)/(R6+jwL)

thankyou
Click here to see answer by bucky(1732)

Question 88429: Find the value of x.
x=3s
x=(a+15)
s=(a-1)
Click here to see answer by bucky(1732)

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