Algebra

Find the domains of rational expressions
2b-2/2b^2-8

please show steps

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asked by michi
  1. (2b-2)/(2b^2-8)

    2b^2-8 = 0
    2b^2 = 8
    b^2 = 4
    b=+-2 Gives a denominator of zero which
    makes the expression Undefined.

    Domain: All real values of b except +2
    and -2.

    Mathematically: -2 > b > 2.

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    posted by Henry
  2. mathematically, |b| ≠ 2
    or b^2 ≠ 4

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    posted by Steve

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