Q. 214.3( 14 Votes )

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Answer :

Given that,


x + y = 4


Squaring both sides, we get


(x + y)2 = 42


x2 + y2 + 2xy = 16


x2 + y2 + 2 (2) = 16


x2 + y2 = 16 – 4


x2 + y2 =12


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