Question

What is the expression in factored form . 9x^2 -4

Answer 1

$\begin{align} 9x^2-4&=\left(\sqrt{9x^2}+\sqrt4\right)\left(\sqrt{9x^2}-\sqrt4\right)\\&=\boxed{(3x+2)(3x-2)} \end$

Answer 2

Since this is a difference in squares it would simplify to (3x-2)(3x+2).