Lesson 277 of 1524
6.5 Factor Trinomials
You also learned some tricks to help determine the factors of a trinomial, such as when the middle term is negative and the last term is positive, the signs in the binomial factors must both be negative.
Practice this chapterYou also learned some tricks to help determine the factors of a trinomial, such as when the middle term is negative and the last term is positive, the signs in the binomial factors must both be negative. By finding the factors of the c term and checking to see if they add up to the b term, you are able to find the factors of a trinomial of this form
You practiced finding the factors of a trinomial of the form a x 2 + b x + c using a trial and error method By finding two numbers that multiply to a c and add to b , you can factor the trinomial by grouping.
middle term — negative and the last term is positive, the signs in the binomial factors must both be negative.
Be able to factor trinomials of the form x 2 + b x + c; factor trinomials of the form a x 2 + b x + c using trial and error; factor trinomials of the form a x 2 + b x + c using the “ a c ” method.
Worked example
What does “middle term” mean in 6.5 Factor Trinomials?
- 1Use the wording this chapter gives for middle term.
- 2The book says: negative and the last term is positive, the signs in the binomial factors must both be negative.
- 3Keep the answer tied to this term.
Result: negative and the last term is positive, the signs in the binomial factors must both be negative
Why. That is the meaning this chapter gives for middle term.
Answer with the meaning this chapter gives. A nearby idea from the same book is a different term.
Practice margin
This chapter
A fresh set from this chapter only. Choose 10 or 20. Multiple choice and fill-in, with no repeat inside the set.