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How to Remove a Common Binomial Factor

When factoring polynomials, the terms are broken down into primes, usually written in parenthetical notation. For example, the polynomial 2x + 2y = 2(x + y). Two is the greatest common factor (GCF) and also a monomial, or a single term. When removing common binomial factors, the term will have two terms added or subtracted and function the same as a monomial GCF. The binomial is still written as a product of the factors in the original polynomial.

Instructions

  1. Polynomials with One Common Binomial

    • 1

      Examine the polynomial 2b(x -- 2y) -- w(x -- 2y). The parenthetical binomial, (x -- 2y), is the GCF between the two terms 2b(x -- 2y) and w(x -- 2y).

    • 2

      Write the GCF in parentheses, (x -- 2y).

    • 3

      Divide the polynomial by the GCF and write the remainder in parentheses so that the solution is written as a product of binomials, (x -- 2y)(2b -- w).

    Polynomials with Two Common Binomials

    • 4

      Examine the polynomial a^2(3a + 5) + a(3a + 5). Here there are two common factors, (a) and (3a + 5).

    • 5

      Pull out the first of the common factors. Divide the terms by the GCF and write the remainder as a product of binomials, (a)[(a)(3a + 5) + (1)(3a + 5)].

    • 6

      Remove the second common factor, (3a + 5) and write the remaining terms as a product of the binomials, (a)(3a + 5)(a + 1).

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