Quantcast

A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

evy15

  • 2 years ago

use factoring to solve (x-1)^2-9=0

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

    |dw:1353268350386:dw|

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

    First at all you should develop the expression between parentesis.

  3. evy15
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    is this using factoring? I need to use all methods

  4. evy15
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    isn't this extracting the square root

  5. evy15
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    @viniterranova do u mean foil it?

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

    If you quadratic trinomial for (x-1)^2 you will find. x^2+2x+1=9, so x^2+2x-8=0

  7. evy15
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    and that's for the factoring method right???

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

    Pay attetion. Just plug the x´s values +3 and -3 in the (x-1)^2=9. See if this is values are valid for the expression.

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

    x^2+2x-8= 0 ; (x-4)(x+2)=0

  10. evy15
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    well i just wanna be sure

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

    Just solve the expression (x-4)(x+2)=0.

  12. evy15
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    wait, im not there yet, so you move the 9 to the other side, and foil (x-1)^2 and I got x^2-2x+1?

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

    Just pass the 8 for the first term of the equation and subtract it. and you got x^2+2x-8= 0

  14. evy15
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    is thiscorrect

    1 Attachment
  15. evy15
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    isn't it a -2x

  16. evy15
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    @Skaematik

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

    Yes, it´s -2x. Sorry for my lack of attention. So, the expression is x^2-2x-8=0

  18. evy15
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    and are the answers I got correct?

  19. evy15
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    @Skaematik can u check my work

  20. evy15
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    @viniterranova I saw ur work, I understand now

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

    • Attachments:

Ask your own question

Sign Up
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.