a maths queation
回答 (2)
2007-12-08 10:03 pm
✔ 最佳答案
x^2+x-2 >0 and 6x^2+x-15 >=0(x+2)(x-1)>0 and (2x-3)(3x+5)>=0
(x<-2 or x>1 )and ( x<=-5/3 or x>=3/2)
x<-2 or x>3/2
2007-12-08 10:01 pm
1.)
x^2+x-2>0
(x+2)(x-1)>0
x>-2 or x>1
2.)
6x^2+x-15 > and=0
(3x+5)(2x-3) > and =0
x>and= -5/3 or x>and=3/2
x^2+x-2>0
(x+2)(x-1)>0
x>-2 or x>1
2.)
6x^2+x-15 > and=0
(3x+5)(2x-3) > and =0
x>and= -5/3 or x>and=3/2
參考: 自己計
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