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For what value of X is in the expression undefined: X+9\X^2-X-12​
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For what value of X is in the expression undefined: X+9\X^2-X-12​

User Tony Eastwood
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it’s undefined when the denominator equals to zero
x²-x-12=0
(x+3)(x-4)=0
x=-3,x=4

when x is -3 and 4, the expression undefined
User Erik Villegas
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