Factor
x\left(r-5x\right)\left(25x^{2}+5rx+r^{2}\right)
Evaluate
x\left(r^{3}-125x^{3}\right)
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x\left(r^{3}-125x^{3}\right)
Factor out x.
\left(-5x+r\right)\left(25x^{2}+5rx+r^{2}\right)
Consider r^{3}-125x^{3}. The sum of cubes can be factored using the rule: a^{3}+b^{3}=\left(a+b\right)\left(a^{2}-ab+b^{2}\right).
x\left(-5x+r\right)\left(25x^{2}+5rx+r^{2}\right)
Rewrite the complete factored expression.
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