Medium Math Class 9 Level 3

If x = 2 is a zero of x² + kx - 10 then what is k?

यदि x = 2 बहुपद x² + kx - 10 का शून्यक है तो k का मान क्या होगा?

A) 2 / 2 B) 3 / 3 C) 4 / 4 D) 5 / 5
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Correct Answer

B. 3 / 3

Explanation

Putting x = 2 gives 4 + 2k - 10 = 0 so 2k = 6 and k = 3.

x = 2 रखने पर 4 + 2k - 10 = 0 इसलिए 2k = 6 और k = 3।

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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