Reducing Rational Expression

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1. Simplify   (6x^4 - 8x^2 + 2x)/2x


  3x3 - 4x + 1

 3x3 - 4x

  3x4 - 4x2 + 1


2. Simplify   (x^2-144)/(x-12)

  x + 12

  x - 12

  -1


3. Simplify (16-x)/(x^2-256)

  1/(x + 16)

  -1/(x+16)

   -(x + 16)

 

4. Simplify (x^2-4x-21)/(x^2-10x+21)

 (-4x-21)/(-10x+21)

 -1

 (x+3)/(x-3)



5. For f(x) = 4x2 - 2x + 2 and g(x) = 2, determine f(x)/g(x)

  2x2 - x

  8x2 - 4x + 4

  2x2 - x + 1


6. For f(x) = 4x2 - 2x + 2 and g(x) = 2, determine f(0)/g(0)

  2x2 - x  + 1

 +1

  Not defined!


7. For f(x) = x2 + 4x + 13 and g(x) = x2 - 10x + 21, what is the domain of  f(x)/g(x)?

  All real numbers except x = 0.

  All real numbers except x = +7 and x = +3.

  All real numbers except x = -7 and x = -3.


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Copyright © 2001 Donna Tupper.