Questions on Algebra: Complex Numbers answered by real tutors!

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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(28536)

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(2152)

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(28536)

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(28536)

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(4667)

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(57285)

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(57285)

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(8893)

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(57285)

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(2189)

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(8893)

Question 84423: factor completely 3x^3-81
Click here to see answer by tutorcecilia(2152)

Question 84442: Solve
-4t>2
Click here to see answer by bucky(2189)

Question 84871: Find all real or imaginary roots of 5x^2 + 5x + 4 = 0.
(If there is more than one root, show additional roots

Click here to see answer by jim_thompson5910(28536)

Question 84869: Solve y^4 = -2 where y is a real number.
Simplify your answer as much as possible.

Click here to see answer by rapaljer(4667)

Question 84867: 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

Click here to see answer by rapaljer(4667)

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(57285)

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(15646)

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(57285)

Question 86187: what is the argument of;(1+i)(root3+i)
Click here to see answer by stanbon(57285)

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(15646)

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(8893)

Question 87260: find the value of the complex number
Click here to see answer by jim_thompson5910(28536)

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(8893)

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(57285)

Question 87991: S=2(pie)(r)(h) + 2(pie)(r^2)
Solve for h
Click here to see answer by tutorcecilia(2152)

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(28536)

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(4667)

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(57285)

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(2189)

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(2189)

Question 88429: Find the value of x.
x=3s
x=(a+15)
s=(a-1)
Click here to see answer by bucky(2189)

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