Medium Math Class 11 Level 1

What are the roots of x² - 10x + 21 = 0?

x² - 10x + 21 = 0 के roots क्या होंगे?

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Correct Answer

A. 3 और 7 / 3 and 7

Explanation

Step 1: Use factorisation method. Step 2: Numbers giving product 21 and sum 10 are 3 and 7 so roots are 3 and 7. Step 3: Check the sum for the middle coefficient.

Step 1: Factorisation method लगाएं। Step 2: 21 का product और 10 का sum देने वाली संख्याएं 3 और 7 हैं इसलिए roots 3 और 7 हैं। Step 3: Middle coefficient के लिए sum check करें।

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