Question

Please help me, you have to simply it

Answer 1

$\bf \sqrt{720x^2y^3}~~ \begin{cases} 720=2\cdot 2\cdot 2\cdot 2\cdot 3\cdot 3\cdot 5\\ \qquad 2^2\cdot 2^2\cdot 3^2\cdot 5\\ \qquad (2^2)^2\cdot 3^2\cdot 5\\ \qquad 4^2\cdot 3^2\cdot 5\\ \qquad (4\cdot 3)^2\cdot 5\\ \qquad 12^2\cdot 5\\ y^3=y^{2+1}\\ \qquad y^2y \end{cases}\implies \begin{array}{llll} \sqrt{12^2\cdot 5x^2y^2y} \\\\\\ 12xy\sqrt{5y} \end{array}$