Quantcast

Got Homework?

Connect with other students for help. It's a free community.

  • across
    MIT Grad Student
    Online now
  • laura*
    Helped 1,000 students
    Online now
  • Hero
    College Math Guru
    Online now

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

Shikar23234

Simplify: (x - 4)2 x2 - 16 x2 - 8 x2 - 8x + 16 x2 - 16x + 8

  • one year ago
  • one year ago

  • This Question is Closed
  1. sam30317
    Best Response
    You've already chosen the best response.
    Medals 1

    When you have a squard function (or any function raised to an exponent), u need to set it up as: (x-4)(x-4)

    • one year ago
  2. sam30317
    Best Response
    You've already chosen the best response.
    Medals 1

    |dw:1339623456630:dw|

    • one year ago
  3. Shikar23234
    Best Response
    You've already chosen the best response.
    Medals 0

    So it would be x2 -8?

    • one year ago
  4. sam30317
    Best Response
    You've already chosen the best response.
    Medals 1

    Nope. U now need to distribute the x and 4 (multiply) with the terms in the OTHER parenthesis

    • one year ago
  5. sam30317
    Best Response
    You've already chosen the best response.
    Medals 1

    (x-4)(x-4)= (x*x) - (4*x) = (x^2-4x) <--- this is only part of it

    • one year ago
  6. Shikar23234
    Best Response
    You've already chosen the best response.
    Medals 0

    Oh!!!! So you basically just multiply the x to the other side and then do the same with the 4. So it would be 4 times x then 4 times 4. Right?

    • one year ago
  7. sam30317
    Best Response
    You've already chosen the best response.
    Medals 1

    Right!!!

    • one year ago
  8. sam30317
    Best Response
    You've already chosen the best response.
    Medals 1

    Show me your answer when finished

    • one year ago
  9. Shikar23234
    Best Response
    You've already chosen the best response.
    Medals 0

    So i know the 16 goes on the very end so im thinking its C but i dont know how it gets the 8.

    • one year ago
  10. sam30317
    Best Response
    You've already chosen the best response.
    Medals 1

    Pay attention to your pos/neg signs when you combine like terms. x^2 -4x-4x+16 ---> Because you have two of the same (-4x), u combine them. -4-4= -8. Do u see??

    • one year ago
  11. Shikar23234
    Best Response
    You've already chosen the best response.
    Medals 0

    Sort of. So its basically x - y + (y*y) ?

    • one year ago
  12. sam30317
    Best Response
    You've already chosen the best response.
    Medals 1

    Errr, i dont understand that little formula. Im sorry. Let me try another way. 1st, do u see why I have two -4's??

    • one year ago
  13. Shikar23234
    Best Response
    You've already chosen the best response.
    Medals 0

    Uhm yea. because its (x-4) and (x-4). So you just put them togeather. x= x2 and -4= -8. Right?

    • one year ago
  14. sam30317
    Best Response
    You've already chosen the best response.
    Medals 1

    Hmmm, u're right. But Hopefully u wont confuse yourself with that formula u had before

    • one year ago
  15. Shikar23234
    Best Response
    You've already chosen the best response.
    Medals 0

    Well what i dont understand is why you have to multiply it when your just simplifying it.

    • one year ago
  16. sam30317
    Best Response
    You've already chosen the best response.
    Medals 1

    Simplify means that you are turning the function/equation into ONE form. Basically, you want to combine all like terms on both sides and reduce it to it's simplest form.

    • one year ago
  17. Shikar23234
    Best Response
    You've already chosen the best response.
    Medals 0

    But then what if your multiplying it? For instance 5xy(2x - y). Does that mean you just to the same thing?

    • one year ago
  18. sam30317
    Best Response
    You've already chosen the best response.
    Medals 1

    The 1st problem u had above, is not giving us any information. But in it's simplest form, we can find maximums & minimums of a graph, points of intersection, slope. You'll learn about all that stuff later. But you cant find the information you need with it being in the simplest form

    • one year ago
  19. sam30317
    Best Response
    You've already chosen the best response.
    Medals 1

    Yes, u do the same thing

    • one year ago
  20. sam30317
    Best Response
    You've already chosen the best response.
    Medals 1

    BUT, 5xy is considered ONE term. Dont separate the 5 from x & y

    • one year ago
  21. Shikar23234
    Best Response
    You've already chosen the best response.
    Medals 0

    So you just separate the 5xy from the (2x - y) ? Then multiply the 2 together?

    • one year ago
  22. sam30317
    Best Response
    You've already chosen the best response.
    Medals 1

    No need to separate anything. A number infront of a parenthesis also means to multiply. Or, to distribute the 1st number with each number on the inside of the parenthesis

    • one year ago
  23. sam30317
    Best Response
    You've already chosen the best response.
    Medals 1

    Try 10(9x+3)

    • one year ago
  24. sam30317
    Best Response
    You've already chosen the best response.
    Medals 1

    It means that (10*9x) PLUS (10*3).

    • one year ago
  25. sam30317
    Best Response
    You've already chosen the best response.
    Medals 1

    |dw:1339625177685:dw|

    • one year ago
  26. Shikar23234
    Best Response
    You've already chosen the best response.
    Medals 0

    So it would be 90x+30. Would you need to simplify?

    • one year ago
  27. sam30317
    Best Response
    You've already chosen the best response.
    Medals 1

    CORRECT! If it is simplified again, it would go back to its orginal form 10(9x+3)

    • one year ago
  28. sam30317
    Best Response
    You've already chosen the best response.
    Medals 1

    Ok, i really suck at explaining! im sorry

    • one year ago
  29. Shikar23234
    Best Response
    You've already chosen the best response.
    Medals 0

    Ohhhhhh! I understand now! Thank you!!!!!

    • one year ago
  30. sam30317
    Best Response
    You've already chosen the best response.
    Medals 1

    cooool! No problem. Do u get the -8 though? I can draw a pic.

    • one year ago
  31. Shikar23234
    Best Response
    You've already chosen the best response.
    Medals 0

    Yea i understand that part now. Seriously though thanks abunch!

    • one year ago
  32. sam30317
    Best Response
    You've already chosen the best response.
    Medals 1

    Cool. Glad i helped somehow

    • one year ago
    • Attachments:

See more questions >>>

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.