Use the product (a + b) (a – b) = a^2 – b^2 to evaluate : 33 27 - Vidyadip

Question

Use the product $(a + b) (a – b) = a^2 – b^2$ to evaluate : $33 \times 27$

✓

Answer

$33 \times 27 $
$= (30+3) (30−3)$
$= (30)^2 − (3)^2$
$= 900 − 9$
$= 891$

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