6000(1-x)²=4860
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![6000(1-x)²=4860](/uploads/image/z/11463477-69-7.jpg?t=6000%EF%BC%881-x%EF%BC%89%26%23178%3B%3D4860)
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6000(1-x)²=4860
6000(1-x)²=4860
6000(1-x)²=4860
6000(1-x)²=4860
100(1-X)^2=81
(1-X)^2=81/100
1-x=±9/10
x=1±9/10
x=1/10或x=19/10
6000(1-x)²=4860
(1-x)²=0.81
1-x=±0.9
x=0.1,x=1.9
6000(1-x)²=4860
(x-1)^2=41/100
x-1=±√41/10
x=1±√41/10