To answer this question, you have to remember that you can't distribute a power the same way you can distribute multiplication and division. So (x+8)3 is the same as (x+8)(x+8)(x+8). Then you multiply it out, and it looks like x3+8x2+8x2+64x+8x2+64x+512 You do this by multiplying each of the numbers in each binomial by each of the other numbers, so first you do xxx, then xx8, then x8x, and so on. Simplified, this looks like x3+32x2+128x+512 Hope this helped!