Question

Simplify the following
$7\sqrt{18}-9\sqrt{8}+12\sqrt{32}-3\sqrt{50}$

Answer 1

$y=7\sqrt{18}-9\sqrt{8}+12\sqrt{32}-3\sqrt{50}$

$y=7\sqrt{3^2,2}-9\sqrt{2^2,2}+12\sqrt{4\times 4\times 2}-3\sqrt{5^{2}2}$

$y=21\sqrt{2}-18\sqrt{2}+48\sqrt{2}-15\sqrt{2}$

$y=36\sqrt{2}$