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Question
If one root of the equation 2x2 + ax + 6 = 0 is 2 then a = ?
Options
7
–7
`7/2`
`(-7)/2`
MCQ
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Solution
–7
Explanation:
It is given that one root of the equation 2x2 + ax + 6 = 0 is 2
∴ 2 × 22 + a × 2 + 6 = 0
⇒ 2a + 14 = 0
⇒ a = –7
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