Question

Simplify the expression to a + bi form:
(-1 + 2i) – (12 + 7i)

Answer 1

`→( - 1 + 2i) - (12 + 7i) \\ = - 1 + 2i - 12 - 7i \\=-1-12+2i-7i \\ = \boxed{ - 13 - 5i}✓`

• - 13 - 5i is the right answer.

Answer 2

-13 - 5i

Explanation:

`( - 1 + 2i) - (12 + 7i) \\ - 1 + 2i - (12 + 7i) \\ - 1 + 2i - 12 - 7i \\ - 13 + 2i - 7i \\ = - 13 - 5i`