a + b = 12 এবং ab = 35 হলে a2 + b2 এর মান কত?
Solution
Correct Answer: Option A
দেওয়া আছে,
এবং ab = 35
.: a2 + b2 = (a + b)2 - 2ab
= 12² - 2.35
= 144-70
= 74
এবং ab = 35
.: a2 + b2 = (a + b)2 - 2ab
= 12² - 2.35
= 144-70
= 74
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