(a-b)(a^2+ab+b^2)
you should recognize the formula for the difference of cubes
so (a-b)(a^2+ab+b^2) = a^3 - b^3
of course you can always expand the given expression to get the same result.
so (a-b)(a^2+ab+b^2) = a^3 - b^3
of course you can always expand the given expression to get the same result.