Quantcast

A community for students. Sign up today!

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

tmts98

  • 2 years ago

I need some help with factoring quadratics.

  • This Question is Closed
  1. syhna
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    use the quadratic formula

  2. tmts98
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    I was looking over my notes for my midterm in Algebra II, and I think I copied down this wrong. It says if my original equation is -x²+14x+40 my factored equation would be -1(x+10)(x+4), I foiled this out because it looked wrong and I got positive x²+14+40. What do I have wrong?

  3. tmts98
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    *this down by the way...

  4. syhna
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    -(x^2 - 14 - 40) now factor x^2 - 14 - 40 using either the quadratic formula of completing the square

  5. tmts98
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Well, I used the quadratic formula and I got: \[x=7\pm3\sqrt{2}\] Is this right?

  6. funinabox
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    to check if your answer is correct, plug the number(s) back into your original expression. if the answer you get is 0, then you have found the correct roots

  7. funinabox
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    because the whole point of factoring is to find what x values make f(x) = 0

  8. tmts98
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Well, now I am just more confused then when I started,.

  9. Not the answer you are looking for?
    Search for more explanations.

    • Attachments:

Ask your own question

Ask a Question
Find more explanations on OpenStudy

Your question is ready. Sign up for free to start getting answers.

spraguer (Moderator)
5 → View Detailed Profile

is replying to Can someone tell me what button the professor is hitting...

23

  • Teamwork 19 Teammate
  • Problem Solving 19 Hero
  • You have blocked this person.
  • ✔ You're a fan Checking fan status...

Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.

This is the testimonial you wrote.
You haven't written a testimonial for Owlfred.