Question

if x=√5-√3/√5+√3 ,y =√5+√3/√5-√3 . find the value of (I) x2+y2​

Answer 1

Answer:

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Step-by-step explanation:

x=(√5+√3)(√5-√3)

 =√5²-√3²                                 (a+b)(a-b)=a²-b²

 =5-3

 =2

y=(√5-√3)(√5+√3)

 =√5²-√3²                                  (a+b)(a-b)=a²-b²

 =5-3

 =2

x²+y²= 2²+2²

       =4+4

       =8

Answer 2

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