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The positive real value of x and y if (x...

The positive real value of x and y if `(xI + y A ) ^(2) = A,` where `A = [{:(1, -1), (2, -1):}] ` and I is an mayri of order 2, are :

A

`x = (1)/(sqrt2) , y = (1)/(sqrt2) `

B

`x = (3)/(2) , y = (1)/(2)`

C

`x = 1, y =1`

D

`x =0, y (3)/(2)`

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