Hard Mathematics Quadratic Equations Class 10 Level 33

(x-2+2(k-1)x+k+5=0) की जड़ें समान हों, तो (k) के मान कौन-से हैं?

If (x-2+2(k-1)x+k+5=0) has equal roots, what are the values of (k)?

Explanation opens after your attempt
Correct Answer

A. (4) और (-1)(4) and (-1)

Step 1

Concept

For equal roots, put (D=0). This gives \(k^2-3k-4=0\), so (k=4) or (k=-1).

Step 2

Why this answer is correct

The correct answer is A. (4) और (-1) / (4) and (-1). For equal roots, put (D=0). This gives \(k^2-3k-4=0\), so (k=4) or (k=-1).

Step 3

Exam Tip

समान जड़ों के लिए (D=0) रखें। इससे \(k^2-3k-4=0\) मिलता है, इसलिए (k=4) या (k=-1)।

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Mathematics Answer, Explanation and Revision Hints

(x-2+2(k-1)x+k+5=0) की जड़ें समान हों, तो (k) के मान कौन-से हैं? / If (x-2+2(k-1)x+k+5=0) has equal roots, what are the values of (k)?

Correct Answer: A. (4) और (-1) / (4) and (-1). Explanation: समान जड़ों के लिए (D=0) रखें। इससे \(k^2-3k-4=0\) मिलता है, इसलिए (k=4) या (k=-1)। / For equal roots, put (D=0). This gives \(k^2-3k-4=0\), so (k=4) or (k=-1).

Which concept should I revise for this Mathematics MCQ?

For equal roots, put (D=0). This gives \(k^2-3k-4=0\), so (k=4) or (k=-1).

What exam hint can help solve this Mathematics question?

समान जड़ों के लिए (D=0) रखें। इससे \(k^2-3k-4=0\) मिलता है, इसलिए (k=4) या (k=-1)।

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