alleryx^2 - 9x + 20 = 0 সমীকরণের মূলগুলির সমষ্টি হলো
A4
B9
C5
D20
Answer & Solution
Correct answer: B. 9
সমীকরণটি (x - 4)(x - 5) হিসাবে উৎপাদকে বিশ্লেষিত হয়, তাই মূলগুলি হলো 4 এবং 5, যাদের যোগফল 9।
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