Quantcast

A community for students. Sign up today!

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

ahoymewmew

  • 2 years ago

help factor. 5y8 - 125

  • This Question is Closed
  1. akash809
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    \[5y^8=125\] ---> \[y^8=25\]---->\[y=\sqrt[8]{25}\]

  2. jackellyn
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    Is it factor or solve for y? (which is what @akash809 did)

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

    its factor for y @jackellyn which im not good at :I

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

    Okay, so the term that 5 and 125 have in common is 5, so you factor that out 125/5=25 so that leaves you with \[5(y ^{8}-25)\]

  5. jackellyn
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    now, let's look at (y^8-25) y^8 is the same as (y^4)^2 and 25 is the same as (5)^2

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

    which will be a difference of squares so you split it into two (y⁴-5)(y⁴+5) and one has a + and one has a - because the product of a + and - is - and dont forget the 5 up front so the answer is 5(y⁴-5)(y⁴+5)

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

    @jackellyn idk why its so hard for me to understand :c i used to know how to do factors but i forgot ._.

  8. jackellyn
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    its all about practice and knowing the rules lol

  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.