8(x + 5)(x squared -2)
8(x+5)(x^2-2)
= 8x(x^2-2) + 8*5(x^2-2)
= 8x^3 - 16x + 40x^2 - 80
you can rearrange that into standard form if you want.
= 8x(x^2-2) + 8*5(x^2-2)
= 8x^3 - 16x + 40x^2 - 80
you can rearrange that into standard form if you want.