Simplify the denominator: .
The initial fraction can now re written as .
is equivalent to , they should be identical for the same values of a and b. Let's check the answer by letting
a and b take on values in both the initial fraction and the closing
fraction. Let's let a = 2 and b = 3. The value of the initial
fraction and the final fraction , using a = 2 and b = 3, should be the same.
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Author: Nancy Marcus