Question

if x and y are two positive real numbers such that (x)2+(4y)2=17 and xy=2, then find the value of x + 2 y​

Answer 1

Your answer mate

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x2 + 4y2 = 17

x2 + (2y)2 = 17

(x + 2y) square - 4xy = 17

(x + 2y)2 - 4(2) = 17

(x + 2y)2 - 8 = 17

(x + 2y)2 = 25

(x + 2y)2 = (5)2

x + 2y = 5 ans.......

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Answer 2

5

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