Question

Please help......................​

Answer 1

x+y=2

(x+y)^2=4 [squaring both sides]

x^2+y^2+2xy=4

x^2+y^2+2(1)=4

x^2+y^2=2

(x^2+y^2)^2=4 [Squaring again]

x^4+y^4+2(x^2y^2)=4

x^4+y^4+2(xy).(xy)=4

x^4+y^4+2=4

x^4+y^4=2

Answer 2

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