ALG II

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Write each rational expression in simplest form and list the values of the variables for which the fraction is undefined.
1. x^2-7x+12/x^2+2x-15

2. 5y^2-20/y^2+4y+4

3. -7+7a/21a^2-21

4. 5(1-b)+15/b^2-16

  • ALG II -

    #2:
    5(y^2-4)/(y+2)^2

    5(y+2)(y-2)/(y+2)^2

    5(y-2)/(y+2)
    undefined where y+2=0, or y = -2.

    Do the others in like wise. What do you get?

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