9X^2=(X-1)^2

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9X^2=(X-1)^29X^2=(X-1)^29X^2=(X-1)^29X^2=(X-1)^29X^2=X^2-2X+18X^2+2X-1=0(4X-1)(2X+1)=04X-1=0或2X+1=0X

9X^2=(X-1)^2
9X^2=(X-1)^2

9X^2=(X-1)^2
9X^2=(X-1)^2
9X^2=X^2-2X+1
8X^2+2X-1=0
(4X-1)(2X+1)=0
4X -1=0 或 2X+1=0
X=1/4 或 X= -1/2