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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 : xy+yz
Now, we find the cubes with the help of formula :
\left(xy+yz\right)^3
\rightarrow\left(xy\right)^3+3.\left(xy\right)^2.yz+3.xy.\left(yz\right)^2+\left(yz\right)^3 [use formula]
\rightarrow x^3y^3+3x^2y^3z+3xy^3z^2+y^3z^3
Ans: x^3y^3+3x^2y^3z+3xy^3z^2+y^3z^3.
