factoring polynomials

Quadratic equations and inequalities, variation equations, function notation, systems of equations, etc.
lochwood536
Posts: 1
Joined: Wed May 16, 2012 3:39 pm
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factoring polynomials

Postby lochwood536 » 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

theshadow
Posts: 114
Joined: Sun Feb 22, 2009 11:12 pm

Re: factoring polynomials

Postby theshadow » 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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