समीकरण \(x^2-7x-30=0\) का धनात्मक मूल कौन सा है?
What is the positive root of \(x^2-7x-30=0\)?
Explanation opens after your attempt
A. (10)
Concept
(x-2-7x-30=(x-10)(x+3)). Therefore the roots are (10) and (-3), and the positive root is (10).
Why this answer is correct
The correct answer is A. (10). (x-2-7x-30=(x-10)(x+3)). Therefore the roots are (10) and (-3), and the positive root is (10).
Exam Tip
(x-2-7x-30=(x-10)(x+3)) है। इसलिए मूल (10) और (-3) हैं तथा धनात्मक मूल (10) है।
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