解(x-1)(x +2)=-2
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解(x-1)(x +2)=-2
解(x-1)(x +2)=-2
解(x-1)(x +2)=-2
开出来
jiediao
x-1+x+2=-2 2x=-2+1-2 2x=-3 x=-3/2
解(x-1)(x +2)=-2
解(x-1)(x +2)=-2
解(x-1)(x +2)=-2
开出来
jiediao
x-1+x+2=-2 2x=-2+1-2 2x=-3 x=-3/2