Question
Find the value of using the column method:
$ (23)^2$
$ (23)^2$
✓
Answer
Given number $23 = 20 + 3$ Here,
$a = 20$ and $b = 3$
$\therefore$ $(23)^2= (400 + 120 + 9) = 529$
$a = 20$ and $b = 3$
|
$a^2$
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$2ab$
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$b^2$
|
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$(20)^2= 400$
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$2 × 20 × 3 = 120$
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$(3)^2= 9$
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