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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Updated on: 10-Oct-2022

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