Question

Simplify the given expression.

(4 + 2i) − (1 − 7i)

5 − 5i

5 + 9i

3 + 9i

3 − 5i

Answer 1

We are working with complex numbers here:
leavein a parenthesis all the numbers involving i and the constants to the other,
operate and done.

Answer 2

(4 + 2i) - (1 - 7i)
you have to distribute the -inbetween the two sets of parentheses to the 1 and -7i
(4 + 2i) -1 + 7i
You cant combine any like terms, therefore:
4 + 2i -1 +7i
Now you can.
3 + 9i

Answer 3

Correct answer is (3 + 9i)