Question
Evaluate $\left\{(83)^2-(17)^2\right\}$
✓
Answer
$(83)^2-(17)^2$
$=(83+17)(83-17)\left[\text { according to the formula }(a)^2-(b)^2=(a+b)(a-b)\right]$
$=(100)(66)$
$=6600$
$=(83+17)(83-17)\left[\text { according to the formula }(a)^2-(b)^2=(a+b)(a-b)\right]$
$=(100)(66)$
$=6600$
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