Question

factor the difference of the two squares 16-49x^2

Answer 1

\(\bf 16-49x^2\qquad \textit{notice that}\quad 16=4^2\qquad 49=7^2\qquad thus\\ \quad \\
16-49x^2\implies 4^2-7^2x^2\implies 4^2-(7x)^2\\ \quad \\
\textit{now recall the difference of squares}\qquad a^2-b^2 = (a-b)(a+b)\)

and expand likewise

Answer 2

and the answer would be?

Answer 3

well, expand it