SOLUTION: Simplify (5+i)(-4-8i)and write the answer in standard form?

Algebra ->  Complex Numbers Imaginary Numbers Solvers and Lesson -> SOLUTION: Simplify (5+i)(-4-8i)and write the answer in standard form?      Log On


   

Question 365403: Simplify (5+i)(-4-8i)and write the answer in standard form?
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Use the FOIL Method,
+%285%2Bi%29%28-4-8i%29=-20-40i-4i-8i%5E2
+%285%2Bi%29%28-4-8i%29=-20-44i%2B8
+highlight%28%285%2Bi%29%28-4-8i%29=-12-44i%29