Questions on Algebra: Complex Numbers answered by real tutors!

Tutors Answer Your Questions about Complex Numbers (FREE)

Question 797052: if x+5+x+3+x+2=32 whats x and how did you find out

Click here to see answer by stanbon(75887)

Question 779315: Find the value of x and y
(x+5)/i+2y=5+i
Click here to see answer by tommyt3rd(5050)

Question 797297: how many solutions real and complex are possible for the equation
Y=-x^7+60x^6-1037x^5-146x^4+123192x^3-363376x^2-2841552x-3278880
Click here to see answer by solver91311(24713)

Question 798432: Please how will I prove whether x is a real number or not in x^2 <2.
Click here to see answer by MathLover1(20849)

Question 798681: Solve for u, where u is a real number. square root of 4u+7 = square root of 6u-15
Click here to see answer by Finavon(81)

Question 798751: how do i create a quartic polynomial with the numbers -2, 4, 4, and 3? I am confused because i can do so with 4 different numbers, but having 2 of the same confuses me and i get lost. Thank you!!
Click here to see answer by josgarithmetic(39613)

Question 798748: Hi. I am supposed to create a 3rd degree polynomial with the roots of -4, 2+i, 2-i. I know I need to change it to show (x+4)(x-(2+i))(x-(2-i))and foil then distribute, but everytime I get confused on if i doing so correctly.
Click here to see answer by MathLover1(20849)

Question 799255: I need so much help with this problem. My math class is online and I have searched through all my notes and videos to see how to do it and I still do not understand it. Please help
Check whether = (0.91 - sqrt(48.2981))/4.7 and = (0.91 + sqrt(48.2981))/4.7 are solutions to the equation -7.51p^2-7.03p-6.63=-7.94p-5.16p^2-11.68.
Click here to see answer by ankor@dixie-net.com(22740)

Question 799298: Find the polar representation of [sin(a)+cos(a)] + i[sin(a)-cos(a)]
Where "a" lies between 0 to 2p.
Click here to see answer by Edwin McCravy(20054)

Question 780466: |x-1| = 5x+10
Click here to see answer by tommyt3rd(5050)

Question 780689: Hi there,
I was wondering if you could help me solve this problem:

I need to solve for x then check my domain. I thought I understood it but I am seeming to get the wrong answer every time.
Thank you!
Click here to see answer by tommyt3rd(5050)

Question 781492: 6(t-2)= 2(9t-2)

Click here to see answer by tommyt3rd(5050)

Question 800180: Complete the square:

Click here to see answer by rothauserc(4718)

Question 800435: 3x^2-(2x-4)=3+3x^2+1
Click here to see answer by josgarithmetic(39613)

Question 800404: X^2=-12 . The instructions on my homework say: solve the equation.
Click here to see answer by meraj(5)

Question 800834: Divide and express in standard form 2/3-i
This is what I tried
(2)/(3-I) . (3+I)/(3+I)
2/3-I = 2/3-I . I/I = 2I/3I+I^2 = 2I/+4 = 2I/3 = 2/2I = i
Click here to see answer by ankor@dixie-net.com(22740)

Question 800311: (2+5i)(-1+5)
Click here to see answer by tommyt3rd(5050)

Question 801256: 2i^59
Click here to see answer by Edwin McCravy(20054)

Question 801258: (-7+9i)=(-12+11i)
Click here to see answer by Edwin McCravy(20054)

Question 801279: 3√-25
Click here to see answer by unlockmath(1688)

Question 783022: How do you simplify (i)-5+(5+8i)? I tried distributing the i to the -5 & got -5i+0i-5. My teacher said that was wrong. Can you please help? Thanks!
Click here to see answer by tommyt3rd(5050)

Question 796069: g(x)+5
Click here to see answer by tommyt3rd(5050)

Question 797591: Write (3 −�7i) −�(-11 + 5i) as a complex number in standard form.
Click here to see answer by tommyt3rd(5050)

Question 779429: Simplify (3+4i )/ (2-5i)
Click here to see answer by tommyt3rd(5050)

Question 785008: Find a complex number z satisfying the given equation
z^2 = i
Click here to see answer by tommyt3rd(5050)

Question 801720: Could you please help me to understand the process of solving for x:
x^2-7=2-5x^2
Click here to see answer by edjones(8007)

Question 801726: Please help me rationalize the denominator...
3(sqrt(2))/2(sqrt(3))-5(sqrt(2))
Thank you for your time...
Click here to see answer by KMST(5328)

Question 794243: please help me solve step by step E=IR,for I

Click here to see answer by tommyt3rd(5050)

Question 802335: find the value of the following complex number: I^5
Click here to see answer by MathLover1(20849)

Question 802335: find the value of the following complex number: I^5
Click here to see answer by DrBeeee(684)

Question 802400: im not sure if this is complex numbers, but i still need help. i do online algebra 11 and i have to solve this 2x + 1 < 5 whats my first step?
Click here to see answer by Alan3354(69443)

Question 802887: (3i)(2-5i)
= 6i-15i^2
= sqrt-6 - (-1)sqrt15
= sqrt-6 + sqrt15 << This was my answer, however my book has a more sensible answer which is: 15+6i.
Can I get help on what I am doing wrong please?
Thank you for your time.
Click here to see answer by Alan3354(69443)

Question 802545: 4 consecutive odd numbers that add up to 200
Click here to see answer by tommyt3rd(5050)

Question 802545: 4 consecutive odd numbers that add up to 200
Click here to see answer by Alan3354(69443)

Question 22474: (3-2i)(6+5i)
Click here to see answer by algebrahelp101(11)

Question 803802: What two number mulitply to -64 and add to be -5
Click here to see answer by Alan3354(69443)

Question 803921: I need help with these problems:
X�-1000=0
125x�-27=0
64x�+8=0
X�+2x�+5x+10=0
6x�+13x-5=0
-x�+27=0
-x�+64=0
8x�-1=0
64x�+8=0

Click here to see answer by Alan3354(69443)

Question 804512: Solve Using the Quadratic Formula
x(4x+18)=10
Click here to see answer by erica65404(394)

Question 805330: rationalize:
(1+i)/(1-i)
Click here to see answer by Edwin McCravy(20054)

Question 805343: write 9-i^2/3-i in standard form
Click here to see answer by Alan3354(69443)

Question 805484: I am working on an assignment for "completing the square" in quadratic functions. The problem I'm working on is
9x^2-12x+4=-3
I am struggling with putting this into vertex form.
Thank you very much!
Click here to see answer by josgarithmetic(39613)

Question 805748: A rectangular piece of land to be developed as a memorial park has an area of 48 m^2. The length of the lot is three times the width of the lot. A rectangular path whose width is x meters is to be constructed along the inner perimeter of the lot. The land contained within the path will be landscaped. The cost to construct the path is $2 per square meter and the cost to landscape the inner field is $3 per square meter. Express the total cost to develop this lot as a function of x, the width of the path.
Click here to see answer by mananth(16946)

Question 805752: Determine which function(s) below have an inverse f^(-1). Can you please explain to me why?
(I) f(x)=x^2-2x (II) f(x)=1/x (III) f(x)=cos x (IV) f(x)=sin x,-π/2≤x≤π/2
(A) I & II
(B) I, II, & III
(C) II, III, & IV
(D) II & IV
(E) none of the above
Click here to see answer by KMST(5328)

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, 4366..4410, 4411..4455, 4456..4500, 4501..4545, 4546..4590, 4591..4635, 4636..4680, 4681..4725, 4726..4770, 4771..4815, 4816..4860, 4861..4905, 4906..4950, 4951..4995, 4996..5040, 5041..5085, 5086..5130, 5131..5175, 5176..5220, 5221..5265, 5266..5310, 5311..5355, 5356..5400, 5401..5445, 5446..5490, 5491..5535, 5536..5580, 5581..5625, 5626..5670, 5671..5715, 5716..5760, 5761..5805, 5806..5850, 5851..5895, 5896..5940, 5941..5985, 5986..6030, 6031..6075, 6076..6120, 6121..6165, 6166..6210, 6211..6255, 6256..6300, 6301..6345, 6346..6390, 6391..6435, 6436..6480, 6481..6525, 6526..6570, 6571..6615, 6616..6660, 6661..6705, 6706..6750, 6751..6795, 6796..6840, 6841..6885, 6886..6930, 6931..6975, 6976..7020, 7021..7065, 7066..7110, 7111..7155, 7156..7200, 7201..7245, 7246..7290, 7291..7335, 7336..7380