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zigzagoon2000 Group Title

Please help! Find the excluded value of the rational expression. (2x + 6)/(4x – 8) A. -3 B. -2 C. 0 D. 2 A, B, C, or D? Please explain (:

  • 2 years ago
  • 2 years ago

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  1. Jusaquikie Group Title
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    instead of x put in a number from your answers and see what you get

    • 2 years ago
  2. Jusaquikie Group Title
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    (2(-3)+6) / (4(-3)-8) = 0/-20 (2(-2)+6) / (4(-2)-8) =2/-16 (2(0)+6) / (4(0)-8) =0/0 (2(2)+6) / (4(2)-8) =10/0

    • 2 years ago
  3. Jusaquikie Group Title
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    that didn't really get us anywhere let's just use algebra \[\frac{ (2x+6) }{(4x-8) } = \frac{ 2(x+3) }{ 4(x-2) }\]

    • 2 years ago
  4. Jusaquikie Group Title
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    we want to find the value where the expression is undefined which happens when the denominator is zero. so what we have to do is make the denominator zero so what would make \[4(x-2) =0?\] when x=2 because \[4(2-2)=4(0)=0\] so D is your answer

    • 2 years ago
  5. zigzagoon2000 Group Title
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    Thank You!

    • 2 years ago
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