You can put this solution on YOUR website! For what value of x is x^2−12x +17 (Over) x^2+ 7x +12 undefined?
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we need to factor the denominator to determine the 0's for which the denominator is undefined
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x^2+ 7x +12 = (x+4) * (x+3)
0's are x = -4, -3
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a) and c)