Medium Math Class 9 Level 1

If x = 3 is a zero of x² - kx + 6 then what is k?

यदि x = 3 बहुपद x² - kx + 6 का शून्यक है तो k का मान क्या होगा?

A) 3 / 3 B) 4 / 4 C) 5 / 5 D) 6 / 6
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Correct Answer

C. 5 / 5

Explanation

Putting x = 3 gives 9 - 3k + 6 = 0 so 15 = 3k and k = 5.

x = 3 रखने पर 9 - 3k + 6 = 0 इसलिए 15 = 3k और k = 5।

Related Questions

Easy Math Class 10 Level 1

What is the area of a circle with radius 7 cm when π = 22/7?

7 सेमी त्रिज्या वाले वृत्त का क्षेत्रफल कितना होगा जब π = 22/7 हो?

A. 44 सेमी² / 44 cm² B. 77 सेमी² / 77 cm² C. 154 सेमी² / 154 cm² D. 308 सेमी² / 308 cm²
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