Answer: 39s(9s-5)
Step-by-step explanation:
(3s*13) (9s-5)
remove the parenthesis ex: (a)=a
3s*13 (9s-5)
Multiply the numbers
39s(9s-5)
[tex](3s^{13})(9s-5)\qquad\text{use the distributive property}\ a(b-c)=ab-ac\\\\=(3s^{13})(9s)-(3s^{13})(5)\\\\=27s^{14}-15s^{13}[/tex]
