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

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 Algebra: Complex Numbers Solvers Lessons Answers archive Quiz In Depth

 Question 244896: what is the solution to this equation: 4+5x =-5 Click here to see answer by prpjoanna(1)
 Question 244896: what is the solution to this equation: 4+5x =-5 Click here to see answer by Theo(3458)

 Question 245744: The two complex numbers z sub1=a/1+i and z sub2=b/1-2i where a,b, is an element of R (all real numbers), are such that z1+z2=3 Calculate the value of a and b. No idea Please help! Click here to see answer by solver91311(16868)

 Question 245747: I need to find all the zeros of the function f(x)=x^2+2ix-3. I'm trying to use the quadratic equation, but I think I'm doing it wrong. Can someone show me step-by-step how to find the zeros of this function? Click here to see answer by jsmallt9(3296)

 Question 245908: An athlete runs 105m south and 80m west. How far is he from the starting point? Click here to see answer by solver91311(16868)

 Question 246109: I wrote problem two ways: I think this one however, is the correct one f(x)=3x^2 + x - 5 f(x)=3x^2 + x - 5 3x^2 + x -5 = 0 Click here to see answer by marcsam823(57)

 Question 246249: z=(1-i)^10 I actually multiplied this out ten times... But I think I have the wrong number? I got -32i... is there a method for this sort of question? Click here to see answer by edjones(7569)

 Question 246256: Find the complex number z = a + bi such that z^3= 2 + 2i where a is less than or equal to 0 and b is greater than or equal to 0. I really don't know how to approach this question but I'm guessing you have to use the definition (a + bi)(c + di) = (ac-bd)+(ad+bc)i? Click here to see answer by jim_thompson5910(28476)

 Question 246419: What is the 2002 digit to the right of the decimal in the expansion of 1/13? Click here to see answer by Edwin McCravy(8879)

 Question 247059: Miscellaneous circuit equation. Find R1 when R is 210. R = 84 --------- R1/2 + R1/3 Click here to see answer by stanbon(57214)

 Question 245722: How to solve 2x^2 + 1 = 0 using imaginary/complex numbers Click here to see answer by richwmiller(9135)

 Question 245576: Solve the equation over complex numbers x^2 – 16 = 5x^2 Click here to see answer by richwmiller(9135)

 Question 247339: "I need your help on solving quadratic numbers." my promblem that i have on my homework is 6t2+5=2t2+1. this is what i had did i did foil making the promblem 12t2-6t2+10t2-5 i added like terms getting 16t2-5. Then i got confusede and stoped Click here to see answer by checkley77(12569)
 Question 247339: "I need your help on solving quadratic numbers." my promblem that i have on my homework is 6t2+5=2t2+1. this is what i had did i did foil making the promblem 12t2-6t2+10t2-5 i added like terms getting 16t2-5. Then i got confusede and stoped Click here to see answer by ankor@dixie-net.com(15622)

 Question 249782: On a problem like x2 + 16. How do you find all the zeros? Click here to see answer by ankor@dixie-net.com(15622)

 Question 250429: How do you solve 4+9i/12i into an expression of standard form? Click here to see answer by stanbon(57214)
 Question 250429: How do you solve 4+9i/12i into an expression of standard form? Click here to see answer by jsmallt9(3296)

 Question 250725: Good evening, I am currently studying for an important exam tomorrow morning, and I am wondering if you can solve my question: I got this problem on a test. The directions say to simplify. (2-i sqrt(5)/(2+i sqrt( 5 ) May I ask how to do this problem? Thanks! Click here to see answer by MRperkins(300)

 Question 250966: (2+3i)(6+4i)=12+8i+18i+12i^2 =12+26i-12 (since i^2 = -1) =26i ans Click here to see answer by vksarvepalli(154)

 Question 251402: i=v/z given v =-1+7.4j gven z = 3.1+5.1j 1 What is the modulus of the current 2 what is the argument of the current in radians Click here to see answer by rfadrogane(214)

 Question 251815: If a matrix B results from a matrix A by applying an elementary row operation, is there always an elementary row operation that can be applied to B to recover A ? Show that if the linear equations x1 + kx2 = c and x1 + lx2 = d have the same solution set, then the equations are identical Click here to see answer by richwmiller(9135)

 Question 251947: Solve over the set of complex numbers: 3g^2-4g+5=0 Click here to see answer by nyc_function(2733)