Find the critical numbers of the following rational polynomial (x^2+2x – InterviewSolution

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1.	Find the critical numbers of the following rational polynomial (x^2+2x-15)/(x^2-9)
Answer» Solution :`(x^2+2x-15)/(x^2-9)=((x+5)(x-3))/((x+3)(x-3))` SINCE the roots of `x^2+2x-15` are(-5,3) and that of `x^2-9` are (-3,3). THEREFORE that CRITICAL points are -5,-3 and 3.

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