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  1. If x – y = 2, xy = 24, then the value of (x2 + y2) is :
    1. 25
    2. 36
    3. 63
    4. 52
Correct Option: D

x2 + y2 = (x – y)2 + 2xy
= 4 + 2 × 24 = 52


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