# Questions on Algebra: Complex Numbers answered by real tutors!

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 Algebra: Complex Numbers Solvers Lessons Answers archive Quiz In Depth

 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 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 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 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 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 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 87227: how to apply complex number to de moviers theorem Click here to see answer by Edwin McCravy(8893)

 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 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 rapaljer(4667)

 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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