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Formula use: \left(a-b\right)^3=a^3-3a^2b+3ab^2-b^3
Here, given expression is : 5x-2y
Now, Find the cubes of :
\left(5x-2y\right)^3
\rightarrow\left(5x\right)^3-3.\left(5x\right)^2.2y+3.5x.\left(2y\right)^2-\left(2y\right)^3
\rightarrow 125x^3-3.25x^2.2y+3.5x.4y^2-8y^3
\therefore 125x^3-150x^2y+60xy^2-8y^3
Ans: 125x^3-150x^2y+60xy^2-8y^3\ .
