यदि \(x=1-\sqrt{5}\), तो \(x^2-2x-4\) का मान क्या है?

If \(x=1-\sqrt{5}\), what is the value of \(x^2-2x-4\)?

Explanation opens after your attempt
Correct Answer

A. (0)

Step 1

Concept

Since \(x-1=-\sqrt{5}\), ((x-1)2=5), so \(x^2-2x-4=0\). Isolate the irrational part and square in exams.

Step 2

Why this answer is correct

The correct answer is A. (0). Since \(x-1=-\sqrt{5}\), ((x-1)2=5), so \(x^2-2x-4=0\). Isolate the irrational part and square in exams.

Step 3

Exam Tip

\(x-1=-\sqrt{5}\), इसलिए ((x-1)2=5) से \(x^2-2x-4=0\) मिलता है। परीक्षा में अपरिमेय भाग अलग करके वर्ग करें।

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यदि \(x=1-\sqrt{5}\), तो \(x^2-2x-4\) का मान क्या है? / If \(x=1-\sqrt{5}\), what is the value of \(x^2-2x-4\)?

Correct Answer: A. (0). Explanation: \(x-1=-\sqrt{5}\), इसलिए ((x-1)2=5) से \(x^2-2x-4=0\) मिलता है। परीक्षा में अपरिमेय भाग अलग करके वर्ग करें। / Since \(x-1=-\sqrt{5}\), ((x-1)2=5), so \(x^2-2x-4=0\). Isolate the irrational part and square in exams.

Which concept should I revise for this Mathematics MCQ?

Since \(x-1=-\sqrt{5}\), ((x-1)2=5), so \(x^2-2x-4=0\). Isolate the irrational part and square in exams.

What exam hint can help solve this Mathematics question?

\(x-1=-\sqrt{5}\), इसलिए ((x-1)2=5) से \(x^2-2x-4=0\) मिलता है। परीक्षा में अपरिमेय भाग अलग करके वर्ग करें।