समीकरण \(x^2-17x+72=0\) के गुणनखंड पहचानने के लिए कौन-सी संख्या जोड़ी उपयोगी है?
Which pair of numbers is useful to identify the factors of \(x^2-17x+72=0\)?
Explanation opens after your attempt
Correct Answer
A. (8) और (9)(8) and (9)
Concept
\(8\cdot9=72\) and (8+9=17). Because the middle term is negative, the factors are ((x-8)(x-9)).
Why this answer is correct
The correct answer is A. (8) और (9) / (8) and (9). \(8\cdot9=72\) and (8+9=17). Because the middle term is negative, the factors are ((x-8)(x-9)).
Exam Tip
\(8\cdot9=72\) और (8+9=17) होता है। ऋण मध्य पद के कारण गुणनखंड ((x-8)(x-9)) बनते हैं।
Login to save your score, XP, coins and progress.