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3 years ago

For what values of x is the rational expression below undefined? x-7/x^2-7x-8

Mathematics

1 answer:

alekssr [168]3 years ago

5 0

We have

f(x)=(x-7)/(x²-7x-8)

resolving the quadratic equation
using a graph tool-------- > see the attached figure
x=-1 x=8
therefore
(x-7)/(x²-7x-8)=(x-7)/[(x+1)*(x-8)

the answer is -1 and 8

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Answer:

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Step-by-step explanation:

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