Find the squares of the following numbers: 862 - Vidyadip

Question

Find the squares of the following numbers:
$862$

✓

Answer

$(862)^2=(800+62)^2$
$\left\{(a+b)^2=a^2+2 a b+b^2\right\}$
$=(800)^2+2 \times 800 \times 62+(62)^2$
$=640000+99200+3844$
$=743044$

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