解方程1.2x-7x+3=0 2.(x-1)=2(1-x) 3.(x-1)+(x-1)-6=0
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解方程1.2x-7x+3=0 2.(x-1)=2(1-x) 3.(x-1)+(x-1)-6=0
解方程1.2x-7x+3=0 2.(x-1)=2(1-x) 3.(x-1)+(x-1)-6=0
解方程1.2x-7x+3=0 2.(x-1)=2(1-x) 3.(x-1)+(x-1)-6=0
1.2x-7x+3=0 (2x-1)(x-3)=0 2x-1=0 x-3=0 x=1/2 或者 x=3 2.(x-1)=2(1-x) (x-1)-2(1-x)=0 (x-1)+2(x-1)=0 (x-1)(x-1+2)=0 x-1=0 x+1=0 x=1 或者 x=-1 3.(x-1)+(x-1)-6=0 [(x-1)+3]*[(x-1)-2]=0 x+2=0 x-3=0 x=-2 或者 x=3