Question

Simplify the expression to a + bi form: (9+7i)(6 + i)

Answer 1

Answer:

47+51i

Step-by-step explanation:

(9+7i)(6+i)

54+42i+9i+7i^2 where i^2=-1

54+42i+9i+7(-1)

54+51i-7

54-7+51i

47+51i

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Answer 2

$(9 + 7i)(6 + i) \\ = 54 + 9i + 42i + 7 {i}^{2} \\ = 54 + 51i - 7 \\ = 47 + 51i$

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