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Formula use: \left(a+b\right)^3=a^3+3.a^2.b+3.a.b^2+b^3
Here, given expression is : abc+2a
Find the cubes with the help of formula :
\left(abc+2a\right)^3
\rightarrow\left(abc\right)^3+3.\left(abc\right)^2.2a+3.abc.\left(2a\right)^2+\left(2a\right)^3 [use formula]
\rightarrow a^3b^3c^3+6a^3b^2c^2+12a^3bc+8a^3
Ans: a^3b^3c^3+6a^3b^2c^2+12a^3bc+8a^3\ .
