SOLUTION: Hello, how do i simplify (9 - 5i)(1 + 3i)

Algebra.Com
Question 90415: Hello, how do i simplify (9 - 5i)(1 + 3i)
Found 2 solutions by jim_thompson5910, checkley75:
Answer by jim_thompson5910(35256)   (Show Source): You can put this solution on YOUR website!
Start with the given expression

Foil

Multiply

Evaluate to get -1

Multiply

Combine like terms. So it is now in form where and

Answer by checkley75(3666)   (Show Source): You can put this solution on YOUR website!
(9-5i)(1+3i)
9-5i+3i-15i^2 (i=SQRT-1 THEREFORE i^2=-1). THEN
9-2i+15
24-2i
2(12-i) ANSWER.

RELATED QUESTIONS

how do you simplify... (answered by Fombitz)
Hello, I need help with (5+3i) - (3-5i) + square root -1 can you please show me to do (answered by jim_thompson5910)
Please help with this! I have to simplify each expression 1. (2+3i)(4+5i) 2.(1 +... (answered by solver91311)
how do i simplify... (answered by stanbon)
1+5i +... (answered by edjones)
2+3i/1-5i (answered by josgarithmetic)
(-6-5i)(1+3i) (answered by AlgebraLady88)
simplify:... (answered by Alan3354)
how to prove... (answered by lostin)