用因式分解法解（2y-11）二次方+3（2y+1）+2=0
问题描述：
用因式分解法解（2y-11）二次方+3（2y+1）+2=0
答
(2y-11)²+3(2y+1)+2=0
(2y-11)²+3(2y-11+12)+2=0
(2y-11)²+3(2y-11)+38=0
∵3²-4×1×38∴方程无解
答
抄错了吧,是
（2y+1）二次方+3（2y+1）+2=0
（2y+1+2）(2y+1-2)=0
(2y+3)(2y-1)=0
y1=-3/2 y2=1/2