Question
Using the formula $(a-b)^2=\left(a^2-2 a b+b^2\right)$, evaluate:
$(196)^2$
$(196)^2$
✓
Answer
$(196)^2$
$=(200-4)^2$
$=(200)^2-2 \times 200 \times 4+(4)^2$
$=40000-1600+16$
$=38416$
$=(200-4)^2$
$=(200)^2-2 \times 200 \times 4+(4)^2$
$=40000-1600+16$
$=38416$
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