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