Answer:
[tex]144 x^{16} +y^{12}[/tex]
Step-by-step explanation:
[tex](4*x^{3}y^{5} )(3*x^{5} y)[/tex]
[tex]4*3* x^{3+5} *y^{5+1}[/tex]
[tex]2^{2} *3*x^{8} *y^{6}[/tex]
Then:
[tex]144*x^{16} *y^{12}[/tex]
[tex]2^{4} *3^{2} *x^{8} *x^{8} *y^{6} *y^{6}[/tex]
[tex](2^{2} * 3 * x^{8} * y^{6} )^{2}[/tex]
