SOLUTION: F(x)= -2/x - 1 (find domain)

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F(x)= -2/(x - 1) (find domain)
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The domain specifies all valid values that 'x' can take.
The ONLY restriction is if the denominator is zero (can't divide by zero).
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setting denominator to zero and solve for x:
x - 1 = 0
x = 1 (this is the ONLY number x can't be)
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Therefore, the domain is all real numbers except 1
Or, interval notation:
(-oo, 1) U (1, +oo)
where oo stands for infinity