Question

find whether X and y are rational or irrational in the following a=2+√3 and b=2-√3, x=a+b,y=a-b
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Answer 1

Answer:

$x = 2 + \sqrt{3} + 2 - \sqrt{3 } \\ x = 4 \\ y = 2 + \sqrt{3} - 2 + \sqrt{3} \\ y = \sqrt{6}$

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