कौन सा समीकरण वास्तविक, परिमेय और भिन्न मूल रखता है?
Which equation has real, rational and distinct roots?
Explanation opens after your attempt
A. \(x^2-9x+20=0\)
Concept
In the first equation (D=(-9)2-4(1)(20)=1). Hence the roots are real, rational and distinct.
Why this answer is correct
The correct answer is A. \(x^2-9x+20=0\). In the first equation (D=(-9)2-4(1)(20)=1). Hence the roots are real, rational and distinct.
Exam Tip
पहले समीकरण में (D=(-9)2-4(1)(20)=1) है। इसलिए मूल वास्तविक, परिमेय और भिन्न हैं।
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