यदि \(x=2+\sqrt{6}\) है, तो \(x^2-4x\) का मान क्या है?
If \(x=2+\sqrt{6}\), what is the value of \(x^2-4x\)?
Explanation opens after your attempt
B. (-2)
Concept
\(x^2=10+4\sqrt{6}\) and \(4x=8+4\sqrt{6}\). Subtracting gives (2).
Why this answer is correct
The correct answer is B. (-2). \(x^2=10+4\sqrt{6}\) and \(4x=8+4\sqrt{6}\). Subtracting gives (2).
Exam Tip
\(x^2=10+4\sqrt{6}\) और \(4x=8+4\sqrt{6}\) है। घटाने पर (2) नहीं, बल्कि (2) मिलता है।
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