Question

Find all numbers that must be excluded from the domain of the given rational expression.

Answer 1

http://www.wtamu.edu/academic/anns/mps/math/mathlab/col_algebra/col_alg_tut8prob1a.gif

Answer 2

8/x^2-4x
If (8/x^2) - 4x, then x ≠ 0, since 8/0 is undefined; 0 must be excluded from the domain of the given rational expression.
If 8/(x^2 - 4x) = 8/x(x - 4), then x ≠ 0 and x ≠ 4; 0 and 4 must be excluded from the domain of the given rational expression.

Answer 3

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