Question

factor completely: 4x^2-16

Answer 1

\(\bf 4x^2-16\implies 2^2x^2-4^2\implies (2x)^2-4^2
\\ \quad \\
\textit{keep in mind that }\implies {\color{brown}{ a^2-b^2 = (a-b)(a+b)}}\)

Answer 2

ok