\begin{array} { l } { \text { Simplify the following. } } \\ { \text {

1.	\begin{array} { l } { \text { Simplify the following. } } \\ { \text { a } ( 3 a + b ) ^ { 3 } + ( 3 a - b ) ^ { 3 } } \\ { \text { c } ( 2 x - y ) ^ { 3 } - ( 2 x + y ) ^ { 3 } } \end{array}
Answer» 27a^3+27a^2b+9ab^2+b^3+27a^3-27a^2b+9ab^2-b^3=54a^3+18ab^2 8x^3-12x^2y+6xy^2-y^3-8x^3-12x^2y-6xy^2-y^3=-24x^2y-2y^3

\begin{array} { l } { \text { Simplify the following. } } \\ { \text { a } ( 3 a + b ) ^ { 3 } + ( 3 a - b ) ^ { 3 } } \\ { \text { c } ( 2 x - y ) ^ { 3 } - ( 2 x + y ) ^ { 3 } } \end{array}

Answer»

27a^3+27a^2b+9ab^2+b^3+27a^3-27a^2b+9ab^2-b^3=54a^3+18ab^2

8x^3-12x^2y+6xy^2-y^3-8x^3-12x^2y-6xy^2-y^3=-24x^2y-2y^3