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If a + b = 11 and ab = 15, then a^2+b^2 ...

If a + b = 11 and ab = 15, then `a^2+b^2` is equal to :
यदि a+b = 11 और ab = 15 है, तो `a^2+b^2` का मान किसके बराबर है ?

A

90

B

91

C

93

D

92

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