Factoring Polynomials Section 2.4 Standards Addressed: A , A , CC.2.2.HS.D.1, CC.2.2.HS.D.2, CC.2.2.HS.D.5
Essential Questions How does the FOIL method relate to factoring quadratic trinomials and a difference of two squares? Why should we factor?
Factoring Checklist Factor out the GCF. If the polynomial has two or three terms, look for: A quadratic trinomial (which can result in a pair of binomial factors) A difference of two squares Check that each factor is prime. Check your answer by multiplying all of the factors.
A quadratic trinomial is a trinomial that is in the format ax 2 + bx + c, where a, b, and c are integers. We will only be working with quadratic trinomials where a = 1. Factoring a quadratic trinomial involves recognizing patterns, estimating, looking for clues, and multiplying to check.
ax 2 + bx + c Quadratic trinomials can often be factored as a product of two binomials. To do so, determine which two numbers have a product equal to c and a sum equal to b.
Example 1: Factor
Worksheet: Factoring Trinomials
Some binomials can be factored as a difference of two squares. a 2 – b 2 = ( a + b )( a – b )
Example 2: Factor
Always check to make sure all polynomials are factored completely.
Example 3: Factor