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lord [1]
3 years ago
11

PLEASE HELP ASAP!! CORRECT ANSWER ONLY PLEASE!! Simplify. (7 − 2i)(8 + 9i)

Mathematics
1 answer:
Lubov Fominskaja [6]3 years ago
5 0

  (7 - 2i)(8 + 9i)

= 7(8 + 9i)   +    -2i(8 + 9i)

= 56 + 63i   +   -16i   - 18i²

= 56           + 47i         +18    <em> (NOTE: i² = -1  →  (-18)(-1) = +18)</em>

= 74 + 47i

Answer: 74 + 47i

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