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27 September, 09:07

For what values of x is the rational expression below undefined?

Check all that apply.

x+8/x^2-2x-24

A. - 6

B. - 8

C. 8

D. 6

E. 4

F. - 4

+2
Answers (1)
  1. 27 September, 12:50
    0
    The simplified form is (x+8) / (x-6) (x+4).

    In order for the expression to be undefined, the denominator must be equal to 0. Therefore you can set (x-6) (x+4) = 0 so theerefore x=6 and x=-4
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