Question 294223
How do you simplify: 
b/b^2-4 + 2/b^2 - 4 
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least common denominator: (b^2-4)
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Combine the numerators over the lcd:
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(b+2)/(b^2-4)
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Factor the denominator:
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= (b+2)/[(b+2)(b-2)]
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= 1/(b-2)
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Cheers,
Stan H.