समीकरण \(x^2+x-20=0\) के मूल कौन से हैं?
What are the roots of \(x^2+x-20=0\)?
Explanation opens after your attempt
A. (4) और (-5)(4) and (-5)
Concept
(x-2+x-20=(x+5)(x-4)). Therefore the roots are (-5) and (4).
Why this answer is correct
The correct answer is A. (4) और (-5) / (4) and (-5). (x-2+x-20=(x+5)(x-4)). Therefore the roots are (-5) and (4).
Exam Tip
(x-2+x-20=(x+5)(x-4)) है। इसलिए मूल (-5) और (4) हैं।
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