Question

Evaluate the following by using the identities:
${54}^2$

Answer 1

We know $(a+b{)}^2=a^2+b^2+2ab$

By using this identity, we have

${54}^2=(50+4{)}^2$

$={50}^2+4^2+2\times 50\times 4$

$=2500+16+400$

$=2916$