1/2（3y-1）-1/5y＜y+1

y(y-2)²-y(y+3)(y-5) y=1/2 化简求值 y(y-2)²-y(y+3)(y-5) y=1/2 化简求值 y(y-2)²-y(y+3)(y-5) y=1/2 化简求值 y (3y^2+8y-3)-6y(3y+2y-1)+9y 解方程：3y^2-(2y+1)(y-1)=(y-5)(y+1) 5y∧2-(y-2)(3y+1)-2(y+1)(y-5) 2(y-4)(3y+2)-5(-3y+7)(y+1),其中y=-1 解方程3y^2-(2y+1)(y-2)=(y-5)(y-1) 解方程：3y²-(2y+1)(y-2)=(y-5)(y+1) 通分 y+3/y*y-6y+9,1/2y+6,y-1/y*y-9 3（Y+1）^2-5(Y+1)(Y-1)+2(Y-1)^2,化简 方程5y（2y-3）=（y+2）（y-2）-1 y-(y-1)/2=1-(2y-3)/5 3y（y-1）等于2（y-1） y-y-1/2=3-y+2/5 解方程y-[3y-1]等于5【y+2] 解不等式组2y+3小于9-y,6y-1＜5,3y+7≥2-y 5y²-（y-2）（3y+1）-2（y+1）（y-5）计算