Question

\(\sqrt{25\left(y+4\right)}+\sqrt{36\left(y+4\right)}-2\sqrt{81\left(y+4\right)}\)

Answer 1

\(\sqrt{25\left(y+4\right)}+\sqrt{36\left(y+4\right)}-2\sqrt{81\left(y+4\right)}\)

\(=\sqrt{5^2\left(y+4\right)}+\sqrt{6^2\left(y+4\right)}-2\sqrt{9^2\left(y+4\right)}\)

\(=5\sqrt{y+4}+6\sqrt{y+4}-2\cdot9\sqrt{y+4}\)

\(=11\sqrt{y+4}-18\sqrt{y+4}\)

\(=-7\sqrt{y+4}\)

Answer 2

\(=5\sqrt{y+4}+6\sqrt{y+4}-2\cdot9\sqrt{y+4}\)

\(=11\sqrt{y+4}-18\sqrt{y+4}\)

\(=-7\sqrt{y+4}\)