## College Algebra 7th Edition

$ab^2(a+b)(a^2-ab+b^2)$
The greatest common monomial factor is $ab^2$. Factor out the greatest common monomial factor to obtain: $=ab^2(a^3+b^3)$ Factor the sum of two cubes using the formula $a^3+b^3=(a+b)(a^2-ab+b^2)$ to obtain: $=ab^2(a+b)(a^2-ab+b^2)$