SOLUTION: I need to understand how to get to the answer.... For all r is not equal to plus or minus 2, (r squared - 5r + 6) over (r squared - 4 = ? What does it mean "for all r is not

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: I need to understand how to get to the answer.... For all r is not equal to plus or minus 2, (r squared - 5r + 6) over (r squared - 4 = ? What does it mean "for all r is not       Log On


   

Question 377801: I need to understand how to get to the answer....
For all r is not equal to plus or minus 2, (r squared - 5r + 6) over (r squared - 4 = ?
What does it mean "for all r is not equal to plus or minus 2"?
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
For all r is not equal to plus or minus 2, (r squared - 5r + 6) over (r squared - 4 = ?
What does it mean "for all r is not equal to plus or minus 2"?
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Problem:
(r^2-5r+6)/(r^2-4)
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Factor this rational expression:
[(r-3)(r-2)]/[(r-2)(r+2)]
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What does it mean "for all r is not equal to plus or minus 2"?
Ans: Since the denominator would be zero if r = 2 or if r = -2,
those values of r are not allowed.
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Cheers,
Stan H.