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Find all excluded values for the expression.

That is, find all values of 'y' for which the expression is undefined.

y^2 - 7y - 8 over y^2 - 8y + 12 (this is written as a fraction)

THANK YOU!

1 answer

since division by zero is undefined, you must exclude any values of y where the denominator is zero
y^2-8y+12 = (y-2)(y-6)
so exclude 2 and 6.
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