Question

please tell answer fast​

Answer 1

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If x - 3 is the factor of polynomial then when we put x as 3 then it will give 0 as resultant.

( 2x² + x + k ) = 0

2 × ( 3 )² + 3 + k = 0

2 × 9 + 3 + k = 0

18 + 3 + k = 0

21 + k = 0

k = - 21

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