\(x^2-19x+90=0\) के मूल क्या हैं?
What are the roots of \(x^2-19x+90=0\)?
Explanation opens after your attempt
A. (x=9,10)
Concept
((x-9)(x-10)=0), so (x=9) and (x=10). In exams, roots are obtained by taking opposite signs of factors.
Why this answer is correct
The correct answer is A. (x=9,10). ((x-9)(x-10)=0), so (x=9) and (x=10). In exams, roots are obtained by taking opposite signs of factors.
Exam Tip
((x-9)(x-10)=0), इसलिए (x=9) और (x=10) हैं। परीक्षा में गुणनखंड के विपरीत चिन्ह से मूल मिलते हैं।
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