PLEASE HELP ASAP!!! CORRECT ANSWER ONLY PLEASE!!
Simplify.
Assume x and y are nonnegative.

[tex]9 \sqrt{56x^7y^{12}}[/tex]
[tex]= 9 \sqrt{(4)(14)x^6 x y^{12}[/tex]
[tex]= 9(2)x^3y^6 \sqrt{14 x}[/tex]
[tex]= 18x^3y^6 \sqrt{14 x}[/tex]
Third one