Find the critical numbers of tile rational polynomial (x^2+4x+3)/(x^2- – InterviewSolution

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1.	Find the critical numbers of tile rational polynomial (x^2+4x+3)/(x^2-x-20).
Answer» Solution :`(x^2+4x+3)/(x^2-x-20)=((x+3)(x+1))/((x+4)(x-5))` Since the ROOTS of `x^2+4x+3` are {-3,-1} and that of `x^2-x-20` are {-4,5}. THEREFORE the critical points are -1,-4,-3 and 5.

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