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which value of x is undefined in the expression x-7/x+2. And an explanation of how to figure this out please.
your expression is undefined when the denominator of your expression is equal to 0. Therefore
x + 2 = 0
x = -2
So your expression is undefined at x = -2.
Anytime that the denominator equals zero, the value is undefined.
So for x=0, your expression is undefined.