If [x-y]^2=12 , and xy=2 .

Find x^2+y^2. pl help.

3 answers

[x-y]^2= x^2+y^2-2xy
12= x^2+Y^2-2*2
So, x^2+Y^2=12+4=16 Is this correct sir ?.

looks good to me

thank you sir.

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