Hello the problem is stated on the uploaded paper ImageShack® - Online Photo and Video Hosting
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The key is recognising that the numerator is a perfect square: $\displaystyle x^4+2x^2+1 = (x^2+1)^2$ note that $\displaystyle 4x^2 + (x^4-2x^2+1) = x^4+2x^2+1$
Ah thanks I get stuck at basic things although I am studying at uni <(-_-)>
Originally Posted by Riazy Ah thanks I get stuck at basic things although I am studying at uni <(-_-)> It's often the way, one forgets the basics when working on harder maths
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