25-09-2018
Mathematics

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PLEASE HELP ASAP!! CORRECT ANSWER ONLY PLEASE!!

Simplify.

(7 − 2i)(8 + 9i)

PLEASE HELP ASAP CORRECT ANSWER ONLY PLEASE Simplify 7 2i8 9i class=

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tramserran tramserran

25-09-2018

(7 - 2i)(8 + 9i)

= 7(8 + 9i) + -2i(8 + 9i)

= 56 + 63i + -16i - 18i²

= 56 + 47i +18 (NOTE: i² = -1 → (-18)(-1) = +18)

= 74 + 47i

Answer: 74 + 47i

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