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1. x2+y2

  • A. 45
  • B. 45
  • C. 45
  • D. 45

Answer: Option C

Explanation:

x2 +  y2=1/2{(x +  y)2 +  (x−y)2}=1/2{(82 +  62)}

=1/2 ×100

=50

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