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Like other exercises in this tutorial, we're rewriting statements into algebraic expression. Factor 4x+18 as 2(2x+9). If we know one linear factor of a higher degree polynomial, can use polynomial division to find other factors the polynomial.
Time we have to choose which is the correct one among those. Factor x^249y^2 as (x+7y)(x7y). Also perform prime factorization on a monomial.