Questions on Algebra: Complex Numbers answered by real tutors!

Tutors Answer Your Questions about Complex Numbers (FREE)

Question 244538: x over 2 minus 1 equal 8

Click here to see answer by richwmiller(9135)

Question 244811: (1+5i)+(1-5i)
Click here to see answer by richwmiller(9135)

Question 244817: (2+3i)(4+5i)
Click here to see answer by College Student(505)

Question 244817: (2+3i)(4+5i)
Click here to see answer by MathTherapy(1420)

Question 244815: (-2+3i)+(4+5i)

Click here to see answer by College Student(505)

Question 244791: -2z + 6z - 9
Click here to see answer by rapaljer(4667)

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 245365: hey are you cute

Click here to see answer by manansala (2)

Question 245493: solve by factoring
4xsquared-12=22
Click here to see answer by dabanfield(803)

Question 245611: Simplify
6 - (8 + 3i)
Click here to see answer by checkley77(12569)

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 245942: f(x)=x^2+10; g(x)=x-3 which is equal to (f=g)(x)?
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 246616: 1+5i + 6+3i
Click here to see answer by edjones(7569)

Question 246898: Can you help me understand
How to find the additive inverse of 2+3i?
Click here to see answer by solver91311(16868)

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 248065: 5+6i/5+3i
Click here to see answer by jim_thompson5910(28476)

Question 249092: what is the answer to -5/8 divided by -15/4?
Click here to see answer by rfer(12644)

Question 249092: what is the answer to -5/8 divided by -15/4?
Click here to see answer by stanbon(57214)

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 250525: I'm on algebra 2 and need help with my work please. It says find the value of the complex numbers pairs. Please check my work.
1. (5+3i)+(-4+2i)
(5-4)+(3i+2i)Answer 1+5i
2. (5+3i)-(-4+2i)
(5+4)+(3i-2i)Answer 9+i
3.(2-4i)(3+i)
6-10i-4(-1)=6-10i+4 Answer 10-10i
4. (2-4i)/(3+i)
(2-4i)/(3+i)Answer -4i+2/i+3
5. (1-i)(3+2i)
(1-i)(3+2i)=3+2i-3i-2i^2 Answer 5-i

Click here to see answer by richwmiller(9135)

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)

Question 252020: (5+2i)+(4-7i)
Click here to see answer by richwmiller(9135)

Question 252021: (5+2i)-(4-7i) and (4-7i)-(5+2i)
Click here to see answer by richwmiller(9135)

Question 252055: Express (3+2i)(6-i)/(2+i)(4+2i) in a + bi form. Round a and b to hundredths.
Thanks for any help!
Click here to see answer by solver91311(16868)

Question 252071: solve and express your answers in simplest a+bi form.
(x squared/4)=x-2 i tried to put all the x's on one side and
i got -x squared+x-8 i have no idea if thats right and if it is
i dont know where to go from there
Click here to see answer by jim_thompson5910(28476)

Question 252083: please solve for Y
(X-Y)/Y=Z
I got as far as:
1/Y=Z/X + 1/X
Click here to see answer by jim_thompson5910(28476)

Question 252083: please solve for Y
(X-Y)/Y=Z
I got as far as:
1/Y=Z/X + 1/X
Click here to see answer by nyc_function(2733)

Question 252093: *i tried to put this in the geometry category for pythagreon thereom but for some reason it wouldnt let me
The hypotenuse of a right triangle is 2cm longer than one leg and 4cm longer then the other.
a.draw and label a diagram
- i attempted to do this and i got the hypotenuse to be 4x and one leg to be 2x and the other to be x
b.let x represent the length of the hypotenuse. Use the pythagreon thereom to write an equation to solve for x.
-i used a squared + b squared=c squared and got 2x squared plus x squared= 4x squared, i was not sure if this was correct but i had to make an attempt
c. find the solutions from the equation in part b.
- i tried to solve for x but i got zero which cant be right because if you plug it into the equation you get zero for all the sides which would make this whole question pointless
help would be very appreciated

Click here to see answer by stanbon(57214)

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