Question

Решите неравенство x^3-2x^2-4x+8=0

Answer 1

X^3 - 2x^2 - 4x + 8 = 0
X^2( x - 2 ) - 4( x - 2 ) = 0
( x - 2 )( x^2 - 4 ) = 0
( x - 2 )( x - 2 )( x + 2 ) = 0
X - 2 = 0 ; x = 2
X + 2 = 0 ; x = - 2
Ответ 2 ; - 2