Factoring 9 - Trinomials Part 2 - Get one factor!

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Taught by YourMathGal
  • Currently 4.0/5 Stars.
7165 views | 2 ratings
Part of video series
Meets NCTM Standards:
Lesson Summary:

In this lesson, we learn how to factor trinomials of the form AX squared plus BX plus C when the coefficient of X squared is not equal to one. By using the product/sum approach, we can find one correct factor and from that factor, easily find the other one. The sneaky trick is to use the product of the first coefficient and the last constant term, then list out all the possible factors to find the sum of the middle term. Once you have one correct factor, you can find the other one by dividing the trinomial by the correct factor and factoring the resulting binomial.

Lesson Description:

This is part 2 of factoring trinomials into 2 binomials when the coefficient of x-squared is not 1. This is an introduction to a sneaky way of finding one correct factor using the product/sum approach, and from that, easily finding the other factor

More free YouTube videos by Julie Harland are organized at http://yourmathgal.com

Questions answered by this video:
  • How do you factor 6x^2 - 11x + 4?
  • How could you figure out the other factor if you are factoring a trinomial if you knew one factor?
  • How could you factor 6x^2 - 11x + 4 if you knew 3x - 4 was a factor?
  • How do you factor 18m^2 - 27m + 4 if you know (6m - 1) is a factor?
  • What is an easy way to find one factor of a trinomial?
  • Is there a trick or an easy way to factor trinomials?
  • How do you factor 15x^2 - 22x + 8?
  • What is the trick to find the first factor of a trinomial?
  • How do you factor 2x^2 - 27x - 14?
  • What is an easy way of finding one factor of 2x^2 - 27x - 14?
  • Is there a shortcut for factoring trinomials?
  • Staff Review

    • Currently 4.0/5 Stars.
    This lesson continues from the previous one in factoring more difficult trinomials. It introduces a sneaky, shortcut method for figuring out the two binomials that a trinomial factors into.
  • brendaa23

    • Currently 5.0/5 Stars.
    this REALLY HELPFUL!