anonymous
  • anonymous
Select one of the factors of 2x^2 + 16x – 18 x + 9 x + 1 x – 2 x – 8
Mathematics
jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
U know Factor Theorem?
anonymous
  • anonymous
No I don't.
anonymous
  • anonymous
If a polynomial f(x) is divided by (x-a) then (x-a) is a factor of f(x) if f(a)=0

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anonymous
  • anonymous
Does it help?
mayankdevnani
  • mayankdevnani
so as per factor therom you get x+1.
mayankdevnani
  • mayankdevnani
anonymous
  • anonymous
Nope... not x+1
anonymous
  • anonymous
It is x+9
anonymous
  • anonymous
I don't see how the factor theorem can help with this question (x^2 + 7x – 44) though?
anonymous
  • anonymous
Did u get for 2x^2 + 16x – 18
anonymous
  • anonymous
I got it but i'm not sure exactly how you worked it out i tried and got stuck
anonymous
  • anonymous
f(x)=2x^2+16x-18 Now, U need to try for every options for which u will get f(a)=0 when it is divided by (x-a)
anonymous
  • anonymous
In this case, When f(x) is divided by (x+9), f(-9)=2*(-9)^2+16*(-9)-18=0
anonymous
  • anonymous
So, one of the factor of f(x) is (x+9)
anonymous
  • anonymous
OK that makes sense.
anonymous
  • anonymous
Now, can u do these type of problems?
anonymous
  • anonymous
I think so thank you.
anonymous
  • anonymous
welcome

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