Question

what is the product of (3 + 7i)(1 − i), and write the answer in standard form.

Answer 1

\[10 + 4i\] That is your answer it is already in standard form :)

Answer 2

You can solve it by using the FOIL method, then combine the real and imaginary parts of the expression

Answer 3

(3 + 7i)(1 - i)
= 3 - 3i +7i -7i^2
= 3 + (-3+7)i + 7