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How to find square of a number?
To do :
We have to explain how o find square of a number.
Solution :
To find the squares of the numbers we can use the following formulas:
$(a+b)^2 = a^2+b^2+2ab$
$(a-b)^2=a^2+b^2-2ab$
For example,
$14^2 = (10+4)^2 = 10^2 +4^2+2(10)(4) = 100+16+80 = 196$.
$19^2 = (20-1)^2 =20^2+1^2-2(20)(1) = 400+1-40 = 361.$
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