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CBSE Class 10 Answered

if X square + 2K x kx + 4 4 is equal to zero has a root x is equal to 2 find the value of k
Asked by hazelvermah | 19 Apr, 2021, 09:02: AM
Expert Answer
As the equation x2 + 2kx + 4 = 0 has root x = 2, so 2 satisfies the given equation.
Therefore, 22 + 2k(2) + 4 = 0
4 + 4k + 4 = 0
Therefore, k = -2
Answered by Renu Varma | 21 Apr, 2021, 12:43: PM
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