\(x^2+10x+21=0\) के लिए सही हल कौनसा है?
Which is the correct solution for \(x^2+10x+21=0\)?
Explanation opens after your attempt
Correct Answer
A. (x=-3,-7)
Concept
(x-2+10x+21=(x+3)(x+7)), so (x=-3,-7). In exams, a positive middle term and positive constant can give both negative roots.
Why this answer is correct
The correct answer is A. (x=-3,-7). (x-2+10x+21=(x+3)(x+7)), so (x=-3,-7). In exams, a positive middle term and positive constant can give both negative roots.
Exam Tip
(x-2+10x+21=(x+3)(x+7)), इसलिए (x=-3,-7) हैं। परीक्षा में धनात्मक मध्य पद और धनात्मक स्थिर पद पर दोनों मूल ऋणात्मक हो सकते हैं।
Login to save your score, XP, coins and progress.