Question

Simplify. Assume x and y are nonnegative.

Answer 1

$9\sqrt{56x^7y^{12}}=\\\\9\sqrt{4x^6\cdot14x \cdot (y^6)^2}=\\\\9y^6\sqrt{14x\cdot (2x^3)^2}=\\\\9y^6\cdot 2x^3\sqrt{14x}=\\\\18x^3y^6\sqrt{14x}$

Answer 2

Here is the answer :)

I actually answered first, but someone else copied me and reported me unfairly. I’ve typed in the step by steps.

Hope this helps