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यदि (a–b) x + (a + b) y = a2 – 2ab – b2 और (a+b) (x+y) = a2 + b2 तो y बराबर है −

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यदि (a–b) x + (a + b) y = a<sup>2 </sup>– 2ab – b<sup>2 </sup>और (a+b) (x+y) = a<sup>2 </sup>+ b<sup>2 </sup>तो y बराबर है −






 
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