Question

Solving equation help please?

Solve the equation in the real number system: x^5 - 4x^4 + 4x^3 + 2x^2 - 5x + 2 = 0

(A) x = -5, -4, 1, 2
(B) x = -1, 1, 2
(C) x = -5, -4, 1, 2, 4
(D) x = -2, -1, 1

Answer 1

(x^3 - 3x +3x - 1)*(x^2 - x - 2) = 0

Answer 2

(x-1)^3 * (x + 1)*(x - 2) = 0

Answer 3

(x-1)=0
or
(x+1)=0
or
(x-2) = 0

Answer 4

x=1 or x=-1 or x=2

Answer 5

thank you

Answer 6

yw