(x-1)²-2(x-1)-3=02x²+3=7x
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(x-1)²-2(x-1)-3=02x²+3=7x
(x-1)²-2(x-1)-3=0
2x²+3=7x
(x-1)²-2(x-1)-3=02x²+3=7x
[(x-1)-3][(x-1)+1]=0
x(x-4)=0
x=0,x=4
2x²-7x+3=0
(2x-1)(x-3)=0
x=1/2,x=3
(x-1-3)(x-1+1)=0
x(x-4)=0
x1=0 x2=4
(x-1)²-2(x-1)-3
=((x-1)-3)((x-1)+1)
=(x-4)x
x=0或4
2x²+3=7x
2x²+3-7x
=(2x-1)(x-3)
x=3或1/2