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Factoring Trinomials of the Form
To factor a trinomial of the form , we need to find two numbers and such that and . Then we write the factored form as .
This works because factoring is the reverse of FOIL multiplication: .
The strategy is:
- Write two sets of parentheses with as the first term of each binomial: .
- Find two numbers and whose product is and whose sum is .
- Use and as the last terms of the two binomials: .
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