Question

help.
evaluate (3-7i)(2+7i)

Answer 1

6+21i-14i-49i^2 combine like terms NOTE: i^2= -1

6+7i-49(-1)

6+7i+49

55+7i

Answer 2

The imaginary (i) is always at the end.

Answer 3

thanks. so for this problem i don't use the foil method?

Answer 4

never mind that question

Answer 5

but thank you so much!