Expert Mathematics Quadratic Equations Class 10 Level 35

(x-2-2(k+6)x+k-2=0) के समान मूलों के लिए (k) क्या होगा?

What is (k) for equal roots of (x-2-2(k+6)x+k-2=0)?

Explanation opens after your attempt
Correct Answer

A. (k=-3)

Step 1

Concept

(D=4(k+6)2-4k-2=0) gives ((k+6)2=k-2), so (12k+36=0) and (k=-3). In exams, expand squares carefully.

Step 2

Why this answer is correct

The correct answer is A. (k=-3). (D=4(k+6)2-4k-2=0) gives ((k+6)2=k-2), so (12k+36=0) and (k=-3). In exams, expand squares carefully.

Step 3

Exam Tip

(D=4(k+6)2-4k-2=0) से ((k+6)2=k-2), इसलिए (12k+36=0) और (k=-3) है। परीक्षा में वर्ग फैलाते समय सावधानी रखें।

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Mathematics Answer, Explanation and Revision Hints

(x-2-2(k+6)x+k-2=0) के समान मूलों के लिए (k) क्या होगा? / What is (k) for equal roots of (x-2-2(k+6)x+k-2=0)?

Correct Answer: A. (k=-3). Explanation: (D=4(k+6)2-4k-2=0) से ((k+6)2=k-2), इसलिए (12k+36=0) और (k=-3) है। परीक्षा में वर्ग फैलाते समय सावधानी रखें। / (D=4(k+6)2-4k-2=0) gives ((k+6)2=k-2), so (12k+36=0) and (k=-3). In exams, expand squares carefully.

Which concept should I revise for this Mathematics MCQ?

(D=4(k+6)2-4k-2=0) gives ((k+6)2=k-2), so (12k+36=0) and (k=-3). In exams, expand squares carefully.

What exam hint can help solve this Mathematics question?

(D=4(k+6)2-4k-2=0) से ((k+6)2=k-2), इसलिए (12k+36=0) और (k=-3) है। परीक्षा में वर्ग फैलाते समय सावधानी रखें।

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