x的平方加2x-3分之3x-5大于等于2
问题描述：
x的平方加2x-3分之3x-5大于等于2
答
(3x-5)/(x^2+2x-3)>=2
(3x-5)/(x^2+2x-3)-2>=0
[(3x-5)-(2x^2+4x-6)]/(x+3)(x-1)>=0
(-2x^2-x+1)/(x+3)(x-1)>=0
(2x^2+x-1)/(x+3)(x-1)