यदि (D=0) और (a=3,b=-12), तो समान मूल क्या होगा?
If (D=0) and (a=3,b=-12), what will be the equal root?
Explanation opens after your attempt
Correct Answer
A. (x=2)
Concept
The equal root is \(x=\frac{-b}{2a}\), so \(x=\frac{12}{6}=2\). In exams, this short formula is useful when (D=0).
Why this answer is correct
The correct answer is A. (x=2). The equal root is \(x=\frac{-b}{2a}\), so \(x=\frac{12}{6}=2\). In exams, this short formula is useful when (D=0).
Exam Tip
समान मूल \(x=\frac{-b}{2a}\) होता है, इसलिए \(x=\frac{12}{6}=2\) है। परीक्षा में (D=0) पर यह छोटा सूत्र उपयोगी है।
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