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  1. If a – b = 11 and ab = 24, then the value of (a2 + b2) is
    1. 169
    2. 37
    3. 73
    4. 48
Correct Option: A

a – b = 11 and ab = 24
∴  (a – b)2 = 112
⇒  a2 + b2 – 2ab = 121
⇒  a2 + b2 – 2 × 24 = 121
⇒  a2 + b2 = 121 + 48 = 169


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