find x and y if (root 5 + root 3)/(root 5 - root 3) = x+y root 15
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Statement 1 tells us that x + y = 15
Statement 2 tells us that √(xy) = 6
and then you say Recognize that (√x + √y)² = x + 2√(xy) + y
I dont recognize this pattern in either of the statements :? how can I recognize it looking at both statements where did you get this formula ? :?
I thought I should do square both sides of √(xy) = 6 so I am getting xy = 36 and also have x + y = 15 so I do something like this
x + y = 15 ---> x = 15-y and plug in here xy = 36 :?
thank you
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