4x = 2 (x - 3) + 1 은

4x = 2 (x - 3) + 1 은


4x = 2x - 6 + 1
4x - 2x = - 5
x = (- 5) 이것 은 2
x = - 2.5



x (x ^ 2 + 1) ^ 2 - 4x ^ 3


오리지널 = x (x ^ 4 + 2x ^ 2 + 1 - 4x ^ 2)
= x (x ^ 4 - 2x ^ 2 + 1)
= x (x ^ 2 - 1) ^ 2
= x (x + 1) ^ 2 (x - 1) ^ 2