Question 148453
{{{(x^3 -5x^2 - 1) 7x^2}}}


Distribute {{{7x^2}}} to everything in the parentheses:


{{{7x^2(x^3 -5x^2 - 1)=(7x^2(x^3))-(7x^2(5x^2)) - (7x^2(1))}}}


Then multiply throughout:


{{{(7x^2(x^3))=7x^5}}}
{{{(7x^2(5x^2))=35x^4}}}
{{{(7x^2(1))=7x^2}}}


Answer:

{{{7x^5-35x^4-7x^2}}}