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June 19th

June 19th

# Factoring Polynomials of the Form ax^2+bx+c

• Using Trial factors
o If the terms of the trinomial do not have a common factor , then the terms of a binomial
factor cannot have a common factor
o When the constant term is positive , the constant terms of the binomials have the same sign
as the coefficient of x
o When the constant
term is negative , the constant terms of the binomials have opposite sign .

Ex. Factor by using trial factors:

Factor by grouping
o First find two factors of ac whose sum is b
o Use the two factors to rewrite the middle term of the trinomial as the sum of two terms.
o Use factoring by grouping

Ex. Factor by grouping:

HW page 439 # 3 – 67 every other odd, 75, 79, 81, 85, 95, 101, 115, 123, 129, 133

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