(X-1)²+2X(X-1)=0
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(X-1)²+2X(X-1)=0(X-1)²+2X(X-1)=0(X-1)²+2X(X-1)=0(x-1)(x-1+2x)=0(x-1)(3x-1)=0x=1或x=1/3
(X-1)²+2X(X-1)=0
(X-1)²+2X(X-1)=0
(X-1)²+2X(X-1)=0
(x-1)(x-1+2x)=0
(x-1)(3x-1)=0
x=1或x=1/3
(X-1)²+2(X-1)=0
(x-1)(x-1+2)=0
(x-1)(x+1)=0
x=1或 x=-1