keky123321
Select one of the factors of 2x^2 + 16x – 18
x + 9
x + 1
x – 2
x – 8



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sauravshakya
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U know Factor Theorem?

keky123321
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No I don't.

sauravshakya
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If a polynomial f(x) is divided by (xa) then (xa) is a factor of f(x) if f(a)=0

sauravshakya
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Does it help?

mayankdevnani
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so as per factor therom you get x+1.

mayankdevnani
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right @sauravshakya

sauravshakya
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Nope... not x+1

sauravshakya
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It is x+9

keky123321
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I don't see how the factor theorem can help with this question (x^2 + 7x – 44) though?

sauravshakya
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Did u get for 2x^2 + 16x – 18

keky123321
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I got it but i'm not sure exactly how you worked it out i tried and got stuck

sauravshakya
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f(x)=2x^2+16x18
Now, U need to try for every options for which u will get f(a)=0 when it is divided by (xa)

sauravshakya
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In this case,
When f(x) is divided by (x+9),
f(9)=2*(9)^2+16*(9)18=0

sauravshakya
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So, one of the factor of f(x) is (x+9)

keky123321
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OK that makes sense.

sauravshakya
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Now, can u do these type of problems?

keky123321
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I think so thank you.

sauravshakya
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welcome