Question

Simplify the expression to a + bi form: (-11 - 7i) (2 +6i)

Answer 1

$( - 11 - 7i)(2 + 6i) \\ = - 22 - 66i - 14i - 42 {i}^{2} \\ = - 22 - 80i + 42 \\ = 20 - 80i$

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Answer 2

Answer:

20-80i

Step-by-step explanation:

(-11-7i)(2+6i)

-22-14i-66i-42i^2 where i^2=-1

-22-14i-66i-42(-1)

-22-14i-66i+42

-22+42-14i-66i

20-14i-66i

20-80i

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