SOLUTION: find the domain of the function f(x)= 1 ------- 2

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Question 101006: find the domain of the function f(x)= 1
-------
2
x + 7x - 8
Answer by edjones(8007) About Me  (Show Source):
You can put this solution on YOUR website!
1/(x^2+7x-8)
division by zero is not allowed.
x^2+7x-8=0
(x+8)(x-1)=0
x=-8 x=1
So the domain of f(x)= all real numbers except x=-8 or x=1
If either of those 2 numbers occur the denominator turns to zero.
Check it out for yourself. Substitute one of those numbers for x.
Ed