Question

4a²-16=
answer quickly​

Answer 1

Answer:

4(a^2-4) is the correct answer

Answer 2

• $\small\sf{\bold{4a}^{2}\:{\bold{-\:16}}}$

${\:\:\::\Longrightarrow\:\small\sf{4a}^{2}\:-\:16}$

${\:\:\::\Longrightarrow\:\small\sf{4a}^{2}\:=\:16}$

${\:\:\::\Longrightarrow\:\small\sf{a}^{2}\:=}{\frac{\cancel{16}^{\:4}}{\cancel{4}}}$

${\:\:\::\Longrightarrow\:\small\sf{a}^{2}\:=\:4}$

${\:\:\::\Longrightarrow\:\small\sf{a\:=\:}{\sqrt{4}}}$

${\:\:\::\Longrightarrow\:\small\sf{a\:=\:2}}$