问题
填空题
解一元二次方程x2+3x+2=0,得x1=______,x2=______.
答案
x2+3x+2=0,
(x+1)(x+2)=0,
x+1=0,x+2=0,
x1=-1,x2=-2,
故答案为:-1,-2.
解一元二次方程x2+3x+2=0,得x1=______,x2=______.
x2+3x+2=0,
(x+1)(x+2)=0,
x+1=0,x+2=0,
x1=-1,x2=-2,
故答案为:-1,-2.