Question

Find the square of the number $34$ using direct multiplication method.

Answer 1

We need to find, square of $34$ as follows:

${34}^2=(30+4{)}^2$

Using, $(a+b{)}^2=a(a+b)+b(a+b)$
Here, $a=30,b=4$
Thus ${34}^2$ $=30(30+4)+4(30+4)$
$=$ ${30}^2+120+120+4^2$
$=900+240+16$
$=1156$