(a+b)-8

(a+b-2)(a^2+2ab+b^2+2a+2b+4)

If you meant:

(a+b)^3 - 8

then your answer is correct

To simplify the expression (a+b)-8, you need to combine like terms.

Given that there are no like terms in the expression, we can only simplify it by performing the subtraction.

To do this, follow these steps:

1. Start by placing parentheses around the addition part of the expression: (a+b).
2. Subtract 8 from (a+b) by subtracting 8 from each term inside the parentheses:
(a+b) - 8 = a + b - 8.
This is the simplified expression.

So, the simplified form of (a+b)-8 is a + b - 8.