Quantcast

A community for students. Sign up today!

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

ashleyb

  • 2 years ago

Solve. x^2 + x = 20

  • This Question is Closed
  1. Izzy25
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 3

    okay so first you move 20 over the = sign

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

    \[x^2+x=20\] \[x^2+x-20=0\] \[x=\frac{-b\pm\sqrt{b^2-4ax}}{2a}\]

  3. Izzy25
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 3

    so it becomes this: |dw:1343183162557:dw|

  4. Izzy25
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 3

    and then like the guy did above you use the QUADRATIC FORMULAAA .. it's quite hectic i tell you... do you need help with that... i can walk you through it

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

    i tried that way already but my hw is asking me to find two x's

  6. Izzy25
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 3

    that is it

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

    oh..then i must of did something wrong

  8. Izzy25
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 3

    so you don't know how to do it because the quadratic formula DOES give u 2 answers

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

    \[a=1,\qquad b=1,\qquad c=-20\]

  10. Izzy25
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 3

    still want me to walk you though it?

  11. Izzy25
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 3

    * through

  12. Izzy25
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 3

    or unkleR can help u that is...

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

    |dw:1343183363230:dw|when i did the quadraric formula i got

  14. Izzy25
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 3

    GOODDDD

  15. Izzy25
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 3

    okay so now just do it one by one... your looking at 2 equations!

  16. Izzy25
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 3

    |dw:1343183439776:dw|

  17. Izzy25
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 3

    or you could leave it like that... idk what ur teacher likes best

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

    oh okay. i understand now. thx for ur help

  19. Izzy25
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 3

    UR WELCOME

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

    You can use sum of roots and product of roots, x^2-(SOR)+(POR)=0 SOR=a+b=-1 POR=ab=-20 Simultaneous equations, a=-5, b=4 Roots are x=-5, x=4

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

    Search OpenStudy
    • 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.