## Intermediate Algebra (6th Edition)

$16x^2+48x+36$
Using $(a+b)^2=a^2+2ab+b^2$ or the Square of a Binomial, the expression, $(4x+6)^2$, is equivalent to \begin{array}{l} (4x)^2+2(4x)(6)+(6)^2 \\\\= 16x^2+48x+36 .\end{array}