समीकरण \(x^2-3x-18=0\) का धनात्मक मूल कौन सा है?
What is the positive root of \(x^2-3x-18=0\)?
Explanation opens after your attempt
A. (6)
Concept
(x-2-3x-18=(x-6)(x+3)). Therefore the roots are (6) and (-3), and the positive root is (6).
Why this answer is correct
The correct answer is A. (6). (x-2-3x-18=(x-6)(x+3)). Therefore the roots are (6) and (-3), and the positive root is (6).
Exam Tip
(x-2-3x-18=(x-6)(x+3)) है। इसलिए मूल (6) और (-3) हैं तथा धनात्मक मूल (6) है।
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