Question

16. Using identities, evaluate.(89) power 2 pls answer fast
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Answer 1

Answer:

89

$89 = 80 + 9 \\ (80 + 9) {}^{2} \\ 80 {}^{2} + 9 {}^{2} + 2 \times 80 + \times 9 \\ \\ 6400 + 81 + \\ 1440 \\ \\ 7921$

Answer 2

Step-by-step explanation:

89^2=(90-1)

8100+1-180

7921

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