Posted by Sébastien on Monday, March 5, 2012 at 3:48pm.
just plug in the good old quotient rule:
[(2x-3)(x^2+x+4) - (x^2-3x+2)[(2x+1)]/(x^2+x+4)^2
= 2(2x^2+2x-7)/(x^2+x+4)^2
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