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Find their Greatest Common Multiple (GCM) which is 3x. Divide it to each terms, Wherein the 1st term is 3x^3, then the 2nd term is 21x^2, and lastly the 3rd term is 27x. You'll arrive at the answer of 3x(x^2-7x-9).

Answer:

Given an equation:  \(3x^3-21x^2-27x\)

A given equation is trinomials have three terms( i.e, \(3x^3\) , \(21x^2\) and \(27x\) )

Factoring is the division of the polynomial terms to the simplest forms.

A greatest common factor (GCF) identifies a factor that all terms within the polynomial have in common.

\((3x)(x^2) - (3x)(7x) - (3x)(9)\)

now, 3x can be removed from the polynomial to simplify the factoring process.

i.e,

\(3x(x^2-7x-9)\)

Therefore, the factor completely of  \(3x^3-21x^2-27x\)  is,\(3x(x^2-7x-9)\)