Description
P(x) = x4 − 2x3 − 8x + 16
x =
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Explanation & Answer
P(x) = x^4 − 2x^3 − 8x + 16
x^4 − 2x^3 − 8x + 16 = 0
x^3(x - 2) - 8(x - 2) = 0
(x^3 - 8)(x - 2) = 0
(x - 2)(x^2 + 2x + 4)(x - 2) = 0
x = 2 x = 2 x^2 + 2x = - 4
x(x + 2) = - 4
x = - 4 x = - 6
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