解不等式2x^2+(5+2a)x+5a

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解不等式2x^2+(5+2a)x+5a解不等式2x^2+(5+2a)x+5a解不等式2x^2+(5+2a)x+5a2x^2+(5+2a)x+5a=(x+1)(2x+5a)(2x+5)(x+a)当ax>

解不等式2x^2+(5+2a)x+5a
解不等式2x^2+(5+2a)x+5a

解不等式2x^2+(5+2a)x+5a
2x^2+(5+2a)x+5a
=(x+1)(2x+5a)

(2x+5)(x+a)<0
当a<5/2时
x>-a或x<-5/2
当a>5/2时
x<-a或x>-5/2
当a=-5/2时
(2x+5)^2<0
X无实解

(2x+5a)(x+1)<0
若a>2/5
则解为-5a/2若a<2/5
则解为-1