Mark M. answered  07/29/15
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X may not be a value that makes the denominator zero.
x2 - 4x - 12
(x - 6)(x + 2)
x ∉ {6, -2)
A.
    Shivansh P.
asked  07/29/15
Mark M. answered  07/29/15
Mathematics Teacher - NCLB Highly Qualified
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