Answer:

is the simplified form of
your given problem:
.
Explanation:
So the given problem is this:

I'm going to do the multiplication in the second ( ).
Nothing can be done in the first ( ) because the operation is addition and those two terms aren't like terms.

I got x^2 because of x(x) part.
Now we get to distribute 8x^2y to both terms in the ( ).

Adding exponents on bases that have the same variable:
