Question

\(\sqrt{4a^4\left(9-6a+a^2\right)}\left(3< a\right)\)

Answer 1

\(\sqrt{4a^4\left(9-6a+a^2\right)}\left(3< a\right)\\ =\sqrt{4a^4\left(a-3\right)^2}\\ =2a^2\left|a-3\right|\\ =2a^2\left(a-3\right)\\ =2a^3-6a^2\)

Answer 2

\(=2a^2\cdot\left|a-3\right|=2a^2\left(a-3\right)=2a^3-6a^2\)