Question

Write the expression as a complex number in standard form: (5-7i)(8+6i) Please show the steps :)

Answer 1

82 - 26 i

sorry my calc dont show the steps.

Answer 2

YAY! That's what I got, I wanted to make sure I was right. Thank you!

Answer 3

(5-7i)(8+6i)
=8(5-7i)+6i(5-7i) can you do the next step?

Answer 4

Ummmmmmmm, will I get the same answer as above?

Answer 5

note i^2=-1

Answer 6

yes the same answer

Answer 7

Ok, I think I'll stick with the method that I have, thank you so much though! :)

Answer 8

ok, if you have a calculator that have complex no. it will be easier..lol

Answer 9

=40-56i+30i-42i^2 now collecting like or same terms

Answer 10

82 - 26 i answer

Answer 11

good luck now, thnx