a + b = ৪ এবং ab = 15 হলে,  a2 + b2 এর মান কত?

A 36

B 32

C 34

D 42

Solution

Correct Answer: Option C

দেয়া আছে,
   a + b = 8
এবং ab = 15

a² + b² = (a + b)² - 2ab
            = 8² - 2(15)
            = 64 - 30
            = 34

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