1.

Find the value of k if x=-1/2 is one root of a quadratic equation 2x^2 +Kx+1=0

Answer»

Answer:

Step-by-step explanation:

2x^2 + kx +1 = 0

Now -1/2 is a root of the EQUATION so it will SATISFY the equation.

Put -1/2 in an equation.

2(-1/2)^2 + k(-1/2) + 1 = 0

2 / 4 - 1/2k + 1= 0

1/2 - 1/2k + 1 = 0

3/2 - 1/2k = 0

-1/2k = -3/2

k = 3



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