SOLUTION: The instructions say Multiply and write the result in the form of a+bi. The problem is (5-8i)(5+2i). I have come up with 9-50i as an answer but I have my doubts about it. Any help

Algebra ->  Inequalities -> SOLUTION: The instructions say Multiply and write the result in the form of a+bi. The problem is (5-8i)(5+2i). I have come up with 9-50i as an answer but I have my doubts about it. Any help       Log On


   

Question 33631: The instructions say Multiply and write the result in the form of a+bi. The problem is (5-8i)(5+2i). I have come up with 9-50i as an answer but I have my doubts about it. Any help would be appreciated. Thanks.
Answer by sarah_adam(201) About Me  (Show Source):
You can put this solution on YOUR website!
(5-8i)(5+2i)
(25 - 40i +10i - 16i^2)
(25 - 30i -16(-1)) (since i^2 = -1)
(25 - 30i +16)
(41 - 30i)
since asked to express in form of a +bi
41+(-30)i