Questions on Algebra: Complex Numbers answered by real tutors!

Tutors Answer Your Questions about Complex Numbers (FREE)

Question 263314: Find the root of the quadratic equation. x^2-8x+15=0
Click here to see answer by Theo(3464)

Question 264075: write a quadratic equation having the given numbers as solutions.
3/5, -9
Click here to see answer by Greenfinch(383)

Question 264075: write a quadratic equation having the given numbers as solutions.
3/5, -9
Click here to see answer by JBarnum(2044)

Question 264075: write a quadratic equation having the given numbers as solutions.
3/5, -9
Click here to see answer by karibet(1)

Question 264155: 81x^2 -4y^2 divided by 9x^2 - 25xy - 6y^2
Click here to see answer by checkley77(12569)

Question 265248: how do you solve for x and y with the imaginary numbers?
Click here to see answer by drk(1908)

Question 265289: How to set up the problem when finding the quotient of two complex numbers?
Click here to see answer by stanbon(57342)

Question 265496: I am doing a practice exam for my GRE and I am stumped on this type of problem. Can you help?
3. Jim can fill a pool carrying buckets of water in 30 minutes. Sue can do the same job in 45 minutes. Tony can do the same job in 1 ½ hours. How quickly can all three fill the pool together?
A. 12 minutes
B. 15 minutes
C. 21 minutes
D. 23 minutes
E. 28 minutes

Click here to see answer by Theo(3464)

Question 265623: How do you find the modulus of z= 3/(5+7i) ? I am asked to find the modulus and Arg(z), but I cannot figure out what x & y are for |z|=sqrt(x^2+y^2) (the modulus).
Thanks!
Click here to see answer by Alan3354(30993)

Question 265688: What is the square root of 550x over 49?
Click here to see answer by solver91311(16885)

Question 265771: how do i show that 3+2i; 3-2i/13 is multiplicative inverse of one another?
Click here to see answer by Edwin McCravy(8909)

Question 265813: Can you explain what the i in a complex number stands for and why it is necessary in some problems?
Also, can you explain the procedures of completing the square of a quadratic equation
Click here to see answer by stanbon(57342)

Question 265950: What is 7+ 4i divided by 9 - 3i?
Click here to see answer by drk(1908)

Question 265950: What is 7+ 4i divided by 9 - 3i?
Click here to see answer by Alan3354(30993)

Question 266129: If [{modulus of(z-i)}/{modulus of(z+i)}]=1
and iz=k. Then find k.
Click here to see answer by Alan3354(30993)

Question 266199: I have 2 question i have answered both but am not confident with the answers.
(2+3i)(x+yi)=23+2i find values for x and y.
express root 2 cis (5pi/4) in cartesian form.
Thak you for your help.
Click here to see answer by stanbon(57342)

Question 266600: how to solve with Given that (x+iy)/(2-i) , find x and y.
Click here to see answer by drk(1908)

Question 267118: Please help with the following to solve these equations for complex solutions and write answer in standard form
x^2-10x+29=0
Click here to see answer by richwmiller(9135)

Question 267513: You are playing paintball with a friend who is standing 15 meters away from you. You shoot at her and miss. The paintball has a horizontal velocity of 150 meters per second. Which of the following sequences describes the distances of the ball from you, in meters, at one-tenth second intervals, starting when it swooshes by her?

Click here to see answer by stanbon(57342)

Question 267913: (x-5)squared-x=30
Click here to see answer by unlockmath(1599)

Question 268311: xsquared = negative 4

Click here to see answer by stanbon(57342)

Question 268448: 10x + y - (10x + y) + 7
Click here to see answer by drk(1908)

Question 268572: 3i
_____
4+2i
Click here to see answer by stanbon(57342)

Question 268742: How do you solve 5x^2-9x+1=x^2-14x+7?
Click here to see answer by persian52(158)

Question 268757: How do you solve (2x-7)(x+1)=-4?
also -12=2(x+4)^2?
Click here to see answer by persian52(158)

Question 268901: How can I solve this equation for b?.... i/a+i/b=3/c Please show steps
Click here to see answer by stanbon(57342)

Question 268901: How can I solve this equation for b?.... i/a+i/b=3/c Please show steps
Click here to see answer by Earlsdon(6287)

Question 269096: how do you do i+(11-5i)
write the expression as a complex number in standard form.
i am not sure but i think you do
-i to the -5i
so you get (11-6i)?
am i correct? or if i am wrong please show me how to please?
Click here to see answer by jim_thompson5910(28595)

Question 269114: (sqrt-75)^3
Click here to see answer by checkley77(12569)

Question 269114: (sqrt-75)^3
Click here to see answer by Alan3354(30993)

Question 269366: how do i find the answer to i(2+i)
Click here to see answer by edjones(7569)

Question 270099: What is 2/3x/4/x and what is 13/xy/26x/3y?
Click here to see answer by unlockmath(1599)

Question 270260: Perform the operation and write the result in standard form.
(7 + i) + (-10 + 5i)
Click here to see answer by jim_thompson5910(28595)

Question 270260: Perform the operation and write the result in standard form.
(7 + i) + (-10 + 5i)
Click here to see answer by Alan3354(30993)

Question 270282: what is 3h-5h+11=17 and what is 7g+14-5g=-8 and what is 4=0.4(3d-5) abd what is 2/3g+1/2g=14
Click here to see answer by jim_thompson5910(28595)

Question 270282: what is 3h-5h+11=17 and what is 7g+14-5g=-8 and what is 4=0.4(3d-5) abd what is 2/3g+1/2g=14
Click here to see answer by rfer(12657)

Question 272850: How can I write the expression as a logarithm of a single quantity for the following exercise.
1/2ln(x)+4ln(y)-3ln(z)
Thanks,
Leidy
Click here to see answer by jim_thompson5910(28595)

Question 273148: how do you write the problem 3i(2-3i) in a+bi form?
Click here to see answer by edjones(7569)

Question 273148: how do you write the problem 3i(2-3i) in a+bi form?
Click here to see answer by solver91311(16885)

Question 273218: Help me solve the equation
(1-x)^5 =x^5
Click here to see answer by Alan3354(30993)

Question 273248: Hello, I am trying to figure out how to write this function in vertex form. The question is:
-x^2+2
any help would be appreciated :)
Click here to see answer by Alan3354(30993)

Question 273269: A number whose tens digit is twice its units digit..?
Click here to see answer by stanbon(57342)

Question 273272: A number where the first two digits are the reverse of 3rd & 4th digits and the last digit is one-half of the fisrt & double of the 2nd..??
Click here to see answer by ankor@dixie-net.com(15650)

Question 273552: How do i solve z=4+3i?
Click here to see answer by solver91311(16885)

Question 273613: find all complex numbers that are solution of give equation the answer leave in a + bi
z^8 - 16 = 0
Click here to see answer by CharlesG2(828)

Older solutions: 1..45, 46..90, 91..135, 136..180, 181..225, 226..270, 271..315, 316..360, 361..405, 406..450, 451..495, 496..540, 541..585, 586..630, 631..675, 676..720, 721..765, 766..810, 811..855, 856..900, 901..945, 946..990, 991..1035, 1036..1080, 1081..1125, 1126..1170, 1171..1215, 1216..1260, 1261..1305, 1306..1350, 1351..1395, 1396..1440, 1441..1485, 1486..1530, 1531..1575, 1576..1620, 1621..1665, 1666..1710, 1711..1755, 1756..1800, 1801..1845, 1846..1890, 1891..1935, 1936..1980, 1981..2025, 2026..2070, 2071..2115, 2116..2160, 2161..2205, 2206..2250, 2251..2295, 2296..2340, 2341..2385, 2386..2430, 2431..2475, 2476..2520, 2521..2565, 2566..2610, 2611..2655, 2656..2700, 2701..2745, 2746..2790, 2791..2835, 2836..2880, 2881..2925, 2926..2970, 2971..3015, 3016..3060, 3061..3105, 3106..3150, 3151..3195, 3196..3240, 3241..3285, 3286..3330, 3331..3375, 3376..3420, 3421..3465, 3466..3510, 3511..3555, 3556..3600, 3601..3645, 3646..3690, 3691..3735, 3736..3780, 3781..3825, 3826..3870, 3871..3915, 3916..3960, 3961..4005, 4006..4050, 4051..4095, 4096..4140, 4141..4185, 4186..4230, 4231..4275, 4276..4320, 4321..4365