Quantcast

A community for students. Sign up today!

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

Nickie_S

  • 3 years ago

Can you help me, not sure where this one wants me to go, can you help me step by step? Andrew factored the expression -4x^3 +2x^2 +8x as -2x(4x^2-2x-8). But when Melissa applied the distributive law and multiplied out -2x(4x^2-2x-8), she got -8x^3+4x^2 +16x; thus, Andrew's solution does not appear to check. Why is that? Please help Andrew to understand this better. Explain your reasoning and correctly factor the original expression, if possible. If the expression is prime, so state. Walk me through it, thank you!

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

    Andrew was correct in factoring out the -2x. Where he introduced an error was in the quadratic factor. He forgor th cut the coefficients in half. The correct factorization is\[-2x(2x^{2} - x - 4)\].

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

    Thanks for your help. I will have one more question to do today, then I am done. I am going to try to do it by myself, but if I need help I will come back here for it.

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

    Okay. I'll keep an eye open for you.

  4. 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.