Medium Math Class 9 Level 7

If x = 6 is a zero of x² - kx + 30 then what is k?

यदि x = 6 बहुपद x² - kx + 30 का शून्यक है तो k का मान क्या होगा?

A 9 / 9 B 10 / 10 C 11 / 11 D 12 / 12
Show answer and explanation
Correct Answer

C. 11 / 11

Explanation

Putting x = 6 gives 36 - 6k + 30 = 0 so 66 = 6k and k = 11.

x = 6 रखने पर 36 - 6k + 30 = 0 इसलिए 66 = 6k और k = 11।

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