Question

Find out the following squares by using the identities:
$(3x+5{)}^2$

Answer 1

We have the identity $(a+b{)}^2=a^2+2ab+b^2$

Here $a=3x,b=5$

By using this identity, we can solve further as

$(3x+5{)}^2=(3x{)}^2+5^2+2\times 3x\times 5=9x^2+25+30x$

This is the required answer.