समीकरण \(x^2-13x+42=0\) के गुणनखंड पहचानने के लिए कौन-सी संख्या जोड़ी उपयोगी है?
Which pair of numbers is useful to identify the factors of \(x^2-13x+42=0\)?
Explanation opens after your attempt
A. (6) और (7)(6) and (7)
Concept
\(6\cdot7=42\) and (6+7=13). Because the middle term is negative, the factors are ((x-6)(x-7)).
Why this answer is correct
The correct answer is A. (6) और (7) / (6) and (7). \(6\cdot7=42\) and (6+7=13). Because the middle term is negative, the factors are ((x-6)(x-7)).
Exam Tip
\(6\cdot7=42\) और (6+7=13) होता है। ऋण मध्य पद के कारण गुणनखंड ((x-6)(x-7)) बनते हैं।
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