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Factoring
Factor by applying the trinomial factoring strategy. The constant term is positive and the middle coefficient is negative, so both numbers in the factor pair must be negative. Step 1 — Set up two binomials with first terms : . Step 2 — Find two negative numbers that multiply to 28 and add to . List the negative factor pairs of 28 and check their sums:
| Factors of 28 | Sum of factors |
|---|---|
| ✓ |
The pair and has a product of 28 and a sum of . Step 3 — Use and as the last terms of the binomials: . Step 4 — Check by multiplying: ✓. The factored form is . This example demonstrates that when the middle term is negative and the constant is positive, only negative factor pairs of the constant need to be tested. Both binomial factors use subtraction rather than addition.
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Ch.7 Factoring - Elementary Algebra @ OpenStax
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Factoring
Factoring
Factoring
Factoring
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