a + b = 12 এবং ab=35 হলে, a2 + b2 এর মান কত?

A    214

B    74

C    49

D    24

Solution

Correct Answer: Option B

 

সমাধানঃ a2 + b2 = (a+b)2 -2ab

=(12)2 – 2.35

= 144 – 70

= 74

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