Question

For what value of k , the polynomial 2x3-kx2+5x+6 exactly divisible by ( x +2)

Answer 1

Step-by-step explanation:

$2 {x}^{3} - k {x}^{2} + 5x + 6$

$2( - 2) {}^{3} - k ( - 2) {}^{2} + 5( - 2) + 6$

$2( - 8) + 2k - 10 + 6$

$- 16 + 2k - 10 + 6$

$- 20 + 2k = 0$

$2k = 20$

$k = 10$

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Answer 2

Answer:

the value of K will be -5

Step-by-step explanation:

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