Work Step by Step
Factor out the GCF $x$ to get $\\=x(x^2-7x-18)$. Factor the trinomial to get $\\=x(x-9)(x+2)$. Check by multiplying the factors: $=x(x^2+2x-9x-18) \\=x(x^2-7x-18) \\=x^3-7x^2-18x$.
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