# Chapter 4 - Polynomials - 4.6 Special Products - 4.6 Exercise Set: 30

$x^2+24x+144$

#### Work Step by Step

Using $(a+b)^2=a^2+2ab+b^2$ or the square of a binomial, the given expression, $(x+12)(x+12)$, is equivalent to \begin{array}{l}\require{cancel} (x+12)^2 \\\\= (x)^2+2(x)(12)+(12)^2 \\\\= x^2+24x+144 .\end{array}

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