Medium Mathematics Quadratic Equations Class 10 Level 29

समीकरण \(9x^2-12x+4=0\) का विवेचक (D) क्या है?

What is the discriminant (D) of \(9x^2-12x+4=0\)?

Explanation opens after your attempt
Correct Answer

A. (0)

Step 1

Concept

Here (D=(-12)2-4\cdot9\cdot4=144-144=0). Even if (b) is negative, \(b^2\) is positive.

Step 2

Why this answer is correct

The correct answer is A. (0). Here (D=(-12)2-4\cdot9\cdot4=144-144=0). Even if (b) is negative, \(b^2\) is positive.

Step 3

Exam Tip

यहाँ (D=(-12)2-4\cdot9\cdot4=144-144=0) है। (b) ऋणात्मक हो तो भी \(b^2\) धनात्मक होता है।

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Mathematics Answer, Explanation and Revision Hints

समीकरण \(9x^2-12x+4=0\) का विवेचक (D) क्या है? / What is the discriminant (D) of \(9x^2-12x+4=0\)?

Correct Answer: A. (0). Explanation: यहाँ (D=(-12)2-4\cdot9\cdot4=144-144=0) है। (b) ऋणात्मक हो तो भी \(b^2\) धनात्मक होता है। / Here (D=(-12)2-4\cdot9\cdot4=144-144=0). Even if (b) is negative, \(b^2\) is positive.

Which concept should I revise for this Mathematics MCQ?

Here (D=(-12)2-4\cdot9\cdot4=144-144=0). Even if (b) is negative, \(b^2\) is positive.

What exam hint can help solve this Mathematics question?

यहाँ (D=(-12)2-4\cdot9\cdot4=144-144=0) है। (b) ऋणात्मक हो तो भी \(b^2\) धनात्मक होता है।

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