(2y+1)2+3(2y+1)+2=0.
问题描述:
(2y+1)2+3(2y+1)+2=0.
答
设2y+1=t.则由原方程,得
t2+3t+2=0,
∴(t+1)(t+2)=0,
∴t+1=0或t+2=0,
解得t=-1或t=-2;
①当t=-1时,2y+1=-1,解得y=-1;
②当t=-2时,2y+1=-2,解得y=-
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综上所述,原方程的解是:y=-1或y=-
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