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For positive x and y, which expression is equivalent to (x^1/2-y^1/2)^2?

a. x-y
b. x+2sqrt(xy)+y
c. x-2sqrt(xy)+y

I need all of the steps to get to the right answer.
Thanks

1 answer

(√x - √y)^2
= x - 2√(xy) + y

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