Hard Math Class 11 Level 1

For x² - 4x + k = 0 to have equal roots what is k?

x² - 4x + k = 0 के equal roots होने के लिए k का मान क्या होगा?

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Correct Answer

B. 4 / 4

Explanation

Step 1: For equal roots D = 0. Step 2: 16 - 4k = 0 gives k = 4. Step 3: In equal root questions set the discriminant to zero.

Step 1: equal roots के लिए D = 0 होता है। Step 2: 16 - 4k = 0 से k = 4। Step 3: equal roots वाले सवाल में discriminant zero रखें।

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