Question

Multiply.
(r+d)(r^2 -rd+d^2)=

Answer 1

r^3+dr^2-r^2d-rd^2+rd^2+d^3

Answer 2

r^3+d^3

Answer 3

this can be done like this
the given is in the form\[(a+b)(a ^{2}-ab+b ^{2})=a ^{3}+b ^{3}\]
hence \[r ^{3}+d ^{3}\]