## Intermediate Algebra (12th Edition)

$4x^2-36x+81$
Using $(a+b)^2=a^2+2ab+b^2$ or the square of a binomial, the product of the given expression, $(2x-9)^2 ,$ is \begin{array}{l}\require{cancel} (2x)^2+2(2x)(-9)+(-9)^2 \\\\= 4x^2-36x+81 .\end{array}