SOLUTION: Compute (2i-6)(5+i), where i^2 = -1. Express your solution in the form of a+bi, where a and b are real numbers. Thank you!

Algebra ->  Complex Numbers Imaginary Numbers Solvers and Lesson -> SOLUTION: Compute (2i-6)(5+i), where i^2 = -1. Express your solution in the form of a+bi, where a and b are real numbers. Thank you!       Log On


   

Question 1189359: Compute (2i-6)(5+i), where i^2 = -1.
Express your solution in the form of a+bi, where a and b are real numbers.
Thank you!
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
Compute (2i-6)(5+i), where i^2 = -1.
Express your solution in the form of a+bi, where a and b are real numbers.
:
rewrite it to
(-6+2i)(5+i)
FOIL
-30 - 6i + 10i + 2i^2
-30 + 4i + 2(-1)
-30 + 4i - 2
(-32 + 4i) is the solution