Questions on Algebra: Complex Numbers answered by real tutors!

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Question 351607: The equation of the line through (9,8) and (3,6) is:
Click here to see answer by Alan3354(30959)

Question 351606: What are the values of x for which (2x-5)(x+3)<0?
Click here to see answer by ewatrrr(10682)

Question 351316: 3+5i........5-5i 4-5i
------ and ---- + ----
9-2i........1+5i 1+5i
I have been able to solve these problems in the form of a + bi but when it comes to fractions and dividing I am lost. Please help! Thank you so much!
Click here to see answer by ankor@dixie-net.com(15624)

Question 351313: show that the following function ( the real part of f(z))are harmonic and find its corresponding v( x,y ) :

e^x *( cos y ) ,

ln (squar x + squar y ) ,

y /squar ( 1 - x ) squar y

what hamonic is mean mathematiclly ?
plz explain>>>
thanks

Click here to see answer by Fombitz(13828)

Question 351895: what does constant mean? Salami and More Deli sells a 5 foot submarine sandwich for parties. It weighs 8 pounds. Assuming that the weight per foot is constant, what would be the length of a 12-pound sandwich?
Click here to see answer by ankor@dixie-net.com(15624)

Question 352455: Good evening, I'm new to complex numbers and think I've figured it out. Please let me know if I am properly handling the complex numbers in the following equation:

=
=

Thank you for your time and expertise!
Click here to see answer by jrfrunner(365)

Question 352760: what is the prime factor of 130
Click here to see answer by sofiyac(695)

Question 353044: (2+i)(3-i)(2-3i)
i=imaginary unit
I know we're supposed to do FOIL, but in what order?
Click here to see answer by solver91311(16868)

Question 353044: (2+i)(3-i)(2-3i)
i=imaginary unit
I know we're supposed to do FOIL, but in what order?
Click here to see answer by robertb(4012)

Question 353340: 1+√(−8)
Click here to see answer by edjones(7569)

Question 353456: write an equation for
adult tickets to a play cost $5 and kids tickets cost $2. if 295 tickets wer sold and a total of $950 was collected how many students tickets were sold?
Click here to see answer by stanbon(57219)

Question 353781: I need help in solving an equation with an extraneous solution
4/x+3/x-3=x/x-3-1/3
Click here to see answer by solver91311(16868)

Question 354078: hello every one >>
may i know if there is any one could solve my question ??
are they so difficult ??
thanks for all
Click here to see answer by mananth(12270)

Question 354377: (4)/(x^2-4)+(2x)/(x-2)+2/(x+2)=0
Click here to see answer by stanbon(57219)

Question 354382: -3i-x+(2i)^4=3+2i/2-i
x=all complex numbers
Solve for x
Thank You in advance!!!
Click here to see answer by stanbon(57219)

Question 354883: Identify all the real roots of each equation.

I don't know what to do in this problem.
Click here to see answer by agentc0re(3)

Question 354955: 2p^2=6p-20
Click here to see answer by robertb(4012)

Question 354980: x^3=1

What are all real and complex solutions. I have the answer in my book but I don't understand where it came from.
Click here to see answer by jim_thompson5910(28476)

Question 355001: How do you solve: (32^-1/3)^-3/5?
It is dealing with negative exponents that happen to be fractions. I know that it is probably very simple, but I am just drawing a blank.
I don't want to know how to put this into the calculator, I want to be able to work it out.
Thanks - Taylor
Click here to see answer by stanbon(57219)

Question 355616: show that the integration of ( cos3x / (x^2 + 1 )^2 ) = 2pi / e^3
would any one help >>??
.

Click here to see answer by robertb(4012)

Question 355686: How do you simplify (4x^3 + 5x +13) + (-4x^2 + 22)
Click here to see answer by vleith(2825)

Question 355637: hi ..devnull@algebra.com
i can't see the solution of the question 355616>>
show that the integration of ( cos3x / (x^2 + 1 )^2 ) = 2pi / e^3

would u please send me the like of the answer..
thanks a lot ..

Click here to see answer by Fombitz(13828)

Question 355691: How do you simplify (3x^2-8x-2)-(11x^2+5x+4)
Click here to see answer by Fombitz(13828)

Question 354938: x^2+4x=?
Click here to see answer by nyc_function(2733)

Question 355875: show that the integration from ( 0 to infinity ) for ( cos 3x / ( x^2+1)^2 )= 2pi/e^3

please .. help .. with steps of solution

Click here to see answer by Fombitz(13828)

Question 356361: how can i solve this problem (4+isquare root of 5)time(2-isquare root of 2)
Click here to see answer by edjones(7569)

Question 356683: what is the best way to help me understand the concept of (i)? i have a terrible teacher and am trying to grasp this concept but it's tricky.
Click here to see answer by edjones(7569)

Question 356723: Simplify
√-90 √-15

Click here to see answer by wild_rose(3)

Question 356723: Simplify
√-90 √-15

Click here to see answer by robertb(4012)

Question 356745: is it so difficult the questions that i asked ??
or theres no one on line to solve ..??
i need the answer very soon.. pleeez
there is no time ..
any one could help ..
i need the steps of solution ..
thanks to any one help
Click here to see answer by Fombitz(13828)

Question 356769: Solve by completing the square
15x2-14x-8=0
Click here to see answer by Fombitz(13828)

Question 356770: Solve by using the quadratic formula (Put in standard form first)
2x2+3x=-7
the first part is 2x to the power of 2
Click here to see answer by mananth(12270)

Question 356768: divide and simplify. Write the final answer in the standard form of a complex number(a+bi)
8-3i
_____
2+3i
Click here to see answer by Fombitz(13828)

Question 356838: Simplify √-124 √-24
Thank you for the help. I just do not understand how to get the answer for this type of expression

Click here to see answer by stanbon(57219)

Question 356848: solve by using the quadratic formula ( put in standard form)
2x2+3x=-7
Click here to see answer by stanbon(57219)

Question 356848: solve by using the quadratic formula ( put in standard form)
2x2+3x=-7
Click here to see answer by ewatrrr(10682)

Question 356696: with the calculus of residues show that
the integration from (0 to 2pi ) for
cos^n theta d theta = n!pi / ( 2^n-1(( n/2)!)^2)..
with explaination of the steps ... pleeeeez..
Click here to see answer by Fombitz(13828)

Question 357133: solve f(x)=x3+3x2+x+3=0
Click here to see answer by user_dude2008(1861)

Question 357132: find an expression in simplest form for a polynomial of third degree with real coefficients having roots of 3 and 1-2i
Click here to see answer by user_dude2008(1861)

Question 357140: Perform indicated operation and simplify. Write each answer in form of a+bi
1. (4+i)(2+3i)
2. 3i/4+2i
3. (5-2i)/(3+6i)
Click here to see answer by jim_thompson5910(28476)

Question 358342: Let w = 2 + 5i and z = -3 + 4i.
Compute 2ww + |z|^2 in Cartesian coordinates. The second w is the conjugate of w, my apologies, I don't know how to show it.
If I understand correctly I'm to get an x and y coordinate however, when I try to compute I end up with a single number. Any help would be greatly appreciated.
Click here to see answer by Alan3354(30959)

Question 358346: 27a4 + 12b2
Click here to see answer by Alan3354(30959)

Question 358846: how do you solve for r-3s+t=4, 3r-6s+9t=5, and 4r-9s+10t=9?
Click here to see answer by stanbon(57219)

Question 358802: how would yu solv a quadratic equation for x^2-4x+6=0 and for x^2+1=0
Click here to see answer by Fombitz(13828)

Question 358805: 1 / x+1 + 2x / x2(squared)-1 - 1 / x-1
Click here to see answer by Fombitz(13828)

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