Question

Use suitable identities for the following product :
$(1+x)(1+x)$

Answer 1

The value of $(1+x)(1+x)$ is $(1+x{)}^2$

We know suitable identities is $(x+y{)}^2=x^2+2xy+y^2$

Therefore, the value of $(1+x{)}^2$ is

$=(1{)}^2+2(1\left)\right(x)+x^2$

$=1+2x+x^2$

$=x^2+2x+1$