anonymous
  • anonymous
How do you subtract Ploynomials?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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anonymous
  • anonymous
An example would be good. So, write two polynomials that you want to subtract and I can show you how to do it.
anonymous
  • anonymous
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 \(p(x)-q(x)\).
anonymous
  • anonymous
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.

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anonymous
  • anonymous
so sorry. I hav to leave.
anonymous
  • anonymous
\(3x^2-2x\) \(-x^2-2x+1\) --------------- \(2x^2-4x+1\)
anonymous
  • anonymous
Haha that's fine.
anonymous
  • anonymous
I was acutually thinking of somethign like Simplify (x3 + 3x2 + 5x – 4) – (3x3 – 8x2 – 5x + 6)
anonymous
  • anonymous
OK. First multiply each term of the second parenthesis by -1, and then just add the like terms.
anonymous
  • anonymous
ooh i get it +- = -
anonymous
  • anonymous
(x3 + 3x2 + 5x – 4) + (3x3 + 8x2 + 5x - 6)
anonymous
  • anonymous
Your final answer should be \(-2x^2+11x^2+10x-10\).
anonymous
  • anonymous
?? wouldnt it be 4x^3
anonymous
  • anonymous
ooh nvm. I see. I becomes +-3x^3 sry. My error.
anonymous
  • anonymous
Exactly :D
anonymous
  • anonymous
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.
anonymous
  • anonymous
OK. Write down a problem!
anonymous
  • anonymous
Could you completely factor this equation please? \[4x ^{3}-44x ^{2}+96x\]
anonymous
  • anonymous
1 sec ill make a new post

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