8-x(x-2)=一又五分之四怎么解

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8-x(x-2)=一又五分之四怎么解8-x(x-2)=一又五分之四怎么解8-x(x-2)=一又五分之四怎么解8-x^2+2x=1.8x^2-2x+1=7.2(x-1)^2=36/5x-1=±6√5/5

8-x(x-2)=一又五分之四怎么解
8-x(x-2)=一又五分之四怎么解

8-x(x-2)=一又五分之四怎么解
8-x^2+2x=1.8
x^2-2x+1=7.2
(x-1)^2=36/5
x-1=±6√5/5
x=(1-6√5)/2,x=(1+6√5)/2