Algebra I Recipe: Factoring Special Products
By G Redden
A. Factoring using the GCF
- Find the largest number common to every coefficient or number.
- Find the GCF of each variable.
- It will always be the variable raised to the smallest exponent.
- Find the terms that the GCF would be multiplied by to equal the original polynomial.
- It looks like the distributive property when in factored form ….. GCF(terms).
3x2 - 6x
2x2 - 4x + 8
5x2y3 + 10x3y
B. Factoring the Difference of Two Squares
- The factors will always be (a + b)(a – b).
- "a" is the square root of the first term
- "b" is the square root of the second term.
9x2 - 49
121x2 - 100
25x2 - 64y2
C. Factoring a Perfect Square Trinomial
- Characteristics
- "ax2" term is a perfect square.
- "c" term is a perfect square.
- "c" term is positive.
- Factors into two identical binomials: (a ± b)2.
- Steps to Factor
- Write it as (a ± b)2 since it factors into two identical binomials.
- "a" is the square root of the "ax2" term.
- "b" is the square root of the "c" terml.
- The operation in the binomial factor is the same as the operation in front of the "x" term.
9x2 - 30x + 25
4x2 + 28xy + 49y2
2x2 + 16x + 32
16x3 + 80x2 + 100x
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