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

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 Algebra: Complex Numbers Solvers Lessons Answers archive Quiz In Depth

 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 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 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 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 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 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 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 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 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 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)