You can put this solution on YOUR website! Please help solve by rationalizing the denominator:
(5 - √y) over (4 + √y)
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Multiply numerator and denominator by (4-sqrt(y)) to get:
[(5-sqrt(y))(4-sqrt(y)]/[16-y]
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= [20+y +sqrt(y)]/[16-y]
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Cheers,
Stan H.