and pls explain why it will be the answer
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Step-by-step explanation:
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d) √x - √y
Step-by-step explanation:
(x - y)/(√x + √y) = (x - y)/(√x + √y) × (√x - √y)/(√x - √y) *take conjugate*
= [(x - y)(√x - √y)] / (√x)² - (√y)² *identity- (a+)(a-b) = a² - b²*
= [(x - y)(√x - √y)] /x - y
= √x - √y *x-y get canceled*
Hope it helps you:)
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