The polynomial x3 + 4×2 – 9x – 36 has 4 terms. use factoring by grouping to find the correct factorization.

The polynomial x3 + 4x2 – 9x – 36 has 4 terms. use factoring by grouping to find the correct factorization.

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  1. x^3 + 4x^2 – 9x – 36
    Factor out common terms in the first two terms and the last two terms
    x^2 (x + 4) - 9 (x + 4)
    factor out the common term (x + 4)
    (x + 4) (x^2 - 9)
    Rewrite
    (x + 4) ( x^2 - 3^2) 
    Use the difference of squares
    (x + 4) (x + 3) (x - 3)

    Hope this helps 🙂

  2. it is a. 4.2 because 7.6-3.4 gets the remaining length of 4.2. i might be wrong but i am pretty sure this is the answer.

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