解不等式 x(x3+3x-5)-(x2+1)(x2+2)>0

来源:学生作业帮助网 编辑:六六作业网 时间:2024/12/23 07:46:48
解不等式x(x3+3x-5)-(x2+1)(x2+2)>0解不等式x(x3+3x-5)-(x2+1)(x2+2)>0解不等式x(x3+3x-5)-(x2+1)(x2+2)>0x(x^3+3x-5)-(

解不等式 x(x3+3x-5)-(x2+1)(x2+2)>0
解不等式 x(x3+3x-5)-(x2+1)(x2+2)>0

解不等式 x(x3+3x-5)-(x2+1)(x2+2)>0
x(x^3+3x-5)-(x^2+1)(x^2+2)>0
x^4+3x^2-5x-x^4-2x^2-x^2-2>0
-5x-2>0
5x+2

x(x3+3x-5)-(x2+1)(x2+2)>0
x^4+3x^2-5x-x^4-3x^2-2>0
-5x-2>0
x<-2/5