Learn Before
Factoring
To factor the trinomial , apply the strategy for trinomials of the form .
Step 1 — Set up two binomials with first terms : .
Step 2 — Find two numbers that multiply to 28 and add to -11. Because the constant term (28) is positive and the middle term's coefficient (-11) is negative, both numerical factors must be negative. List the negative factor pairs of 28 and check their sums:
- -1 and -28: sum is -29
- -2 and -14: sum is -16
- -4 and -7: sum is -11
The pair -4 and -7 works because their product is 28 and their sum is -11.
Step 3 — Use -4 and -7 as the last terms of the binomials: .
Step 4 — Check by multiplying: .
The factored form is .
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Intermediate Algebra @ OpenStax
Ch.6 Factoring - Intermediate Algebra @ OpenStax
Algebra
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Factoring
Factoring
Factoring
Factoring
Learn After
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