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Question
One root of equation 3x2 – mx + 4 = 0 is 1, the value of m is ______.
Options
7
–7
`4/3`
`-4/3`
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Solution
One root of equation 3x2 – mx + 4 = 0 is 1, the value of m is 7.
Explanation:
Given quadratic equation be
3x2 – mx + 4 = 0 ...(1)
Since 1 is the root of equation (1)
∴ 1 satisfies equation (1)
∴ 3 × 12 – m + 4 = 0
`\implies` 7 – m = 0
`\implies` m = 7
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