Example

3(r+2s)=2t-4
a⋅(b-2)=3b
3(r+2s)=2t-4
a⋅(b-2)=3b

Question

$$xx^{2}-21x; x^{3}-9x; x^{2}-8x+15$$

Answer

$$x^3-21*x;x^3-9*x;x^2-8*x+15$$

Solution


Simplify  \(x{x}^{2}\)  to  \({x}^{3}\).
\[\begin{aligned}&{x}^{3}-21x\\&{x}^{3}-9x\\&{x}^{2}-8x+15\end{aligned}\]
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