Quantcast

Got Homework?

Connect with other students for help. It's a free community.

  • across
    MIT Grad Student
    Online now
  • laura*
    Helped 1,000 students
    Online now
  • Hero
    College Math Guru
    Online now

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

ILoVeMaTh3

What is the factored form of x^2 + 6x + 8? I got (x+4) (x+2)

  • one year ago
  • one year ago

  • This Question is Closed
  1. ZeHanz
    Best Response
    You've already chosen the best response.
    Medals 1

    You're right! Just expand again (FOIL)...

    • one year ago
  2. ILoVeMaTh3
    Best Response
    You've already chosen the best response.
    Medals 0

    so 5 and 3?

    • one year ago
  3. ZeHanz
    Best Response
    You've already chosen the best response.
    Medals 1

    Or use: 4+2 = 6 (coefficient of x) 4*2 = 8 (constant at the end)

    • one year ago
  4. ZeHanz
    Best Response
    You've already chosen the best response.
    Medals 1

    Rule is: the numbers you are looking for have sum 6 and product 8

    • one year ago
  5. ILoVeMaTh3
    Best Response
    You've already chosen the best response.
    Medals 0

    ah thanks so it is 4 and 2 because 4 + 2 = 6 and 4 x 2 = 8

    • one year ago
  6. ILoVeMaTh3
    Best Response
    You've already chosen the best response.
    Medals 0

    factoring makes so much sense now thanks

    • one year ago
  7. ZeHanz
    Best Response
    You've already chosen the best response.
    Medals 1

    Yes! Another one: x²+5x+6 = (x+2)(x+3) They're not all that easy though, because sometimes there are negative numbers involved, or there seem to be many numbers to choose from...

    • one year ago
  8. ILoVeMaTh3
    Best Response
    You've already chosen the best response.
    Medals 0

    yeah I see it now :)

    • one year ago
  9. ZeHanz
    Best Response
    You've already chosen the best response.
    Medals 1

    E.g. this one: x²-3x-28 Sum = -3 (many possibilities, don't bother with them!) Prod. = -28...hmm that could be: (one of them should be negative, because product is negative ) -1, 28 or 1,-28 no: sum goes wrong -2, 14 or 2, -14 no .... -4, 7 or 4, -7 ...yes! Sum of 4 and -7 is -3 So: (x-7)(x+4) Now I will stop ;)

    • one year ago
    • Attachments:

See more questions >>>

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.