Medium Mathematics Quadratic Equations Class 10 Level 30

समीकरण \(x^2-18x+81=0\) को किस पूर्ण वर्ग रूप में लिखा जा सकता है?

In which perfect square form can \(x^2-18x+81=0\) be written?

Explanation opens after your attempt
Correct Answer

A. ((x-9)2=0)

Step 1

Concept

(x-2-18x+81=(x-9)2). To identify a perfect square, match the middle term with (2ab).

Step 2

Why this answer is correct

The correct answer is A. ((x-9)2=0). (x-2-18x+81=(x-9)2). To identify a perfect square, match the middle term with (2ab).

Step 3

Exam Tip

(x-2-18x+81=(x-9)2) होता है। पूर्ण वर्ग पहचानने के लिए मध्य पद (2ab) से मिलाएं।

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Mathematics Answer, Explanation and Revision Hints

समीकरण \(x^2-18x+81=0\) को किस पूर्ण वर्ग रूप में लिखा जा सकता है? / In which perfect square form can \(x^2-18x+81=0\) be written?

Correct Answer: A. ((x-9)2=0). Explanation: (x-2-18x+81=(x-9)2) होता है। पूर्ण वर्ग पहचानने के लिए मध्य पद (2ab) से मिलाएं। / (x-2-18x+81=(x-9)2). To identify a perfect square, match the middle term with (2ab).

Which concept should I revise for this Mathematics MCQ?

(x-2-18x+81=(x-9)2). To identify a perfect square, match the middle term with (2ab).

What exam hint can help solve this Mathematics question?

(x-2-18x+81=(x-9)2) होता है। पूर्ण वर्ग पहचानने के लिए मध्य पद (2ab) से मिलाएं।

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