Question 97150
(x+h)(x+h)(x+h)= ?
= (x^2+2hx+h^2)(x+h)

= (x^2+2hx+h^2)x + (x^2+2hx+h^2)h

= x^3+2hx^2+h^2x + hx^2+2h^2x + h^3

= x^3 + (2x+h)x^2 + (h^2+2h^2)x + h^3

= x^3 + (3h)x^2  + (3h^2)x + h^3
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Cheers,
Stan H.