What values of x is the expression 5x-7divided by x^2-8x-20 undefined?

I cant find the answer to this question plz help.
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1 Answer

(5x - 7)/(x^2-8x-20) =(5x -7/[(x-10)(x+2)]

x-10=0 and x+2 =0

the denominator can not be  0, so

x=10 and x= -2  the expression is undefined
by Level 8 User (36.8k points)

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