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  1. The term to be added to 121a2 +64b to make a perfect square is
    1. 176 ab
    2. 276 a2
    3. 178 ab
    4. 188 b2a
Correct Option: A

121a2 + 64b2
= (11a)2 + (8b)2
∵  (x + y)2 = x2 + y2 + 2xy
∴  Required expression
= 2 × 11a × 8b = 176ab


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