Question

Evaluate:
(i) 88 × 92
(ii) 78 × 82

Answer 1

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

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