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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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What is a permutation mean in math?

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  • Common mathematics problems involve choosing only several items from a group of items in a specified sequence.

What are permutations used for?

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  • Combinations are employed when determining merely the number of potential groups is required and neither the order nor the sequence of arrangements is necessary.

Given,

            No. of captains of the football team = 4

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Therefore, 24 different ways can they line up to receive their championship rings.

Learn more about permutation

brainly.com/question/1216161

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