AR/AR-15-MTH/OS-07-MT-I15.The roots of the equation 4x2 + kx + 3 =are – InterviewSolution

1.

AR/AR-15-MTH/OS-07-MT-I15.The roots of the equation 4x2 + kx + 3 =are real and equal. What is the valueof k ?

Answer»

The equation is 4x²+kx+3 = 0

now for real and equal roots ∆ = b²-4ac= 0

=> (k)²-(4*4*3) = 0=> k² = 48=> k = ±√48 = ±4√3

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