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प्रश्न
If x + 1 is a factor of the polynomial 2x2 + kx, then k =
विकल्प
-2
-3
4
2
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उत्तर
As (x + 1)is a factor of polynomial f(x) = 2x^2 + kx .Therefore, f(-1) = 0
So,
`2(-1)^2 + k(-1) = 0`
`2 -k = 0`
` = 2`
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