haileyw123
25.03.2020 •
Mathematics
If (x+2) is a factor of 2x 3 + 5x 2 – x-k, then value of k is
(a) 6
(b) – 24
(C)-6 (d) 24
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Ответ:
k = 6
Step-by-step explanation:
Solution:
p(x) = 2x^3 + 5x^2 - x - k
x + 2 = 0
x = -2
p(-2) = 2(-2)^3 + 5(-2)^2 - (-2) - k
0 = -16 + 20 + 2 - k
0 = 6 - k
Therefore, k = 6
OPTION (a) 6
PLZ MARK ME AS BRAINLIEST!!!
Ответ: