因式分解解方程、 2x^2+x=0 (x+1)^2-2(x+1)=0 x^2-3x+2=0
人气:189 ℃ 时间:2020-03-21 21:23:32
解答
2x^2+x=0
x(2x+1)=0
x=0,x=-1/2
(x+1)^2-2(x+1)=0
(x+1)(x+1-2)=0
(x+1)(x-1)=0
x=-1,x=1
x^2-3x+2=0
(x-2)(x-1)=0
x=2,x=1
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