6.1 Factoring a polynomial containing the sum of monomials means finding an equivalent expression that is the product

6.2 If the product of the factors is the original polynomial, the factorization is correct.

6.3 Once you finish factoring, you can prove it to be correct by multiplying the factors using the FOIL method. You should get the original trinomial.

6.4 The difference of squares of two terms factors are as the product of a sum and a difference of those terms.

6.6 A quadratic equation in x can be written in standard form ax^2+bx+c=0

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