Question

Find The Value Of k if -2 is the zero of the polynomial 2x^3 + 5x^2 - x - k

Answer 1

Answer:

so this is your answer 2(-2)^3 + 5(-2)^2 - (-2) -k

2 x -8 + 5 x 4 + 2 - k = 0

-16+20+2-k =0

6-k =0

6= k is the answer for this

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Answer 2

Firstly u have to replace -2 in the place of 'x'

2(-2)^3 + 5(-2)^2 - (-2) -k

2 x -8 + 5 x 4 + 2 - k = 0

-16+20+2-k =0

6-k =0

k = 6 is the answer

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