Evaluate: (i) 88 × 92

Question:

Evaluate:

(i) 88 × 92

(ii) 78 × 82

Solution:

(i) $88 \times 92=(90-2) \times(90+2)=\left(90^{2}-2^{2}\right)=8100-4=8096$

(ii) $78 \times 82=(80-2) \times(80+2)=\left(80^{2}-2^{2}\right)=6400-4=6396$

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Teddy Pryor
Feb. 10, 2023, 5:55 p.m.
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