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anonymous

  • 5 years ago

How do you subtract Ploynomials?

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  1. anonymous
    • 5 years ago
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    An example would be good. So, write two polynomials that you want to subtract and I can show you how to do it.

  2. anonymous
    • 5 years ago
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    Let me give you an example here. Suppose you have \(p(x)=3x^2-2x\), and \(q(x)=x^2+2x-1\), and you're asked to find \(p(x)-q(x)\).

  3. anonymous
    • 5 years ago
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    First thing you should do here is to multiply each term of q(x) by \(-1\), that means to change the sign of each term. So \(-q(x)=-x^2-2x+1\). Now add this to \(p(x)\) by adding the coefficients of each like terms.

  4. anonymous
    • 5 years ago
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    so sorry. I hav to leave.

  5. anonymous
    • 5 years ago
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    \(3x^2-2x\) \(-x^2-2x+1\) --------------- \(2x^2-4x+1\)

  6. anonymous
    • 5 years ago
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    Haha that's fine.

  7. anonymous
    • 5 years ago
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    I was acutually thinking of somethign like Simplify (x3 + 3x2 + 5x – 4) – (3x3 – 8x2 – 5x + 6)

  8. anonymous
    • 5 years ago
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    OK. First multiply each term of the second parenthesis by -1, and then just add the like terms.

  9. anonymous
    • 5 years ago
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    ooh i get it +- = -

  10. anonymous
    • 5 years ago
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    (x3 + 3x2 + 5x – 4) + (3x3 + 8x2 + 5x - 6)

  11. anonymous
    • 5 years ago
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    Your final answer should be \(-2x^2+11x^2+10x-10\).

  12. anonymous
    • 5 years ago
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    ?? wouldnt it be 4x^3

  13. anonymous
    • 5 years ago
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    ooh nvm. I see. I becomes +-3x^3 sry. My error.

  14. anonymous
    • 5 years ago
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    Exactly :D

  15. anonymous
    • 5 years ago
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    THANK YOU SOOOOOO MUCH. I have a big test tom. I just need a few more things. I know how to add,multiply, and now subtract ;) polynomials. Now to factor them completely.

  16. anonymous
    • 5 years ago
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    OK. Write down a problem!

  17. anonymous
    • 5 years ago
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    Could you completely factor this equation please? \[4x ^{3}-44x ^{2}+96x\]

  18. anonymous
    • 5 years ago
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    1 sec ill make a new post

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