Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

flyinglikeabird?

  • 3 years ago

Solve the quadratic equation 5x2 - 125 = 0. Show all your steps.

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

    I know I do something like x^2 - b = c

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

    \[\begin{align} 5x^2-125&=0\\ 5x^2&=125\\ x^2&=25\\ x&=\pm5 \end{align}\]

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

    You just divided by 5?

  4. merchandize
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    To solve this by factoring you first must divide the eqn by 5. Then subtract the right-hand result. Now you have the diff of 2 squares you should be able to factor it from there.

  5. flyinglikeabird?
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Okay, factor what?

  6. merchandize
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    (x+5)(x-5)=0 i.e x=+5,x=-5

  7. flyinglikeabird?
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Ohh right! Thank you!

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

    • Attachments:

Ask your own question

Sign Up
Find more explanations on OpenStudy
Privacy Policy