factoring polynomials  TOPIC_SOLVED

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factoring polynomials

Postby lochwood536 on Wed May 16, 2012 3:56 pm

How do you factor this expression?
2x^2 + 8
I get this far 2(x^2+4)
is this as far as it goes or does the (x^2+4) factor further?
Thanks
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Re: factoring polynomials  TOPIC_SOLVED

Postby theshadow on Wed May 16, 2012 10:37 pm

lochwood536 wrote:2x^2 + 8
I get this far 2(x^2+4)
is this as far as it goes or does the (x^2+4) factor further?

x^2+4 is a sum of squares not a difference of squares, so it doesn't factor. Taking the 2 out is all you can do.
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