ax^3+ax^2+x大于等于0怎么解,

问题描述:

ax^3+ax^2+x大于等于0怎么解,

ax^3 ax^2 x≥ 0 → x(ax^2 ax 1)≥0 ① a=0时,x≥0 ② a> 0时,Ⅰ.04时解得,[-a- √ (a^2-4a)]/2a ≤x ≤[-a+√ (a^2-4a)]/2或x ≥ 0 ③a0,解得 [-a- √ (a^2-4a)]/2a ≤x ≤ 0或x ≥ [-a+√ (a^2-4a)]/2 所以纵上...