60(x-1)(x-1) =48.6 解方程
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60(x-1)(x-1)=48.6解方程60(x-1)(x-1)=48.6解方程60(x-1)(x-1)=48.6解方程60(x-1)²=48.6(x-1)²=0.81x-1=0.
60(x-1)(x-1) =48.6 解方程
60(x-1)(x-1) =48.6 解方程
60(x-1)(x-1) =48.6 解方程
60(x-1)²=48.6
(x-1)²=0.81
x-1=0.9 或 x-1=-0.9
x=1.9 或x=0.1
(x-1)²=48.6/60=0.81
x-1=±0.09
x=0.91 x=1.09
x=1.9或x=0.1
x=1.9.过程：由题意，得，(x-1)(x-1)=68.6/60=0.81,所以x-1=0.9，x=1.9
60(x-1)(x-1) =48.6
(x-1)^2=0.81
x-1=±0.9
x1=1.9 x2=0.1
(x-1)²=0.81
x-1=0.9 x-1=-0.9
x=1.9 或x=0.1
一个“整式的乘法”的问题请先阅读下列解题过程,再仿做下面的问题.已知X*X + X - 1=0,求X*X*X + 2*X*X + 3的值.解X*X*X + 2X*X +3=X*X*X +X*X -X +X*X +X +3=X{X*X +X -1} +X*X +X -1 +4=0+0+4=4+ x + X*X + X*X*X=0.+ X*X + X*X*X
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x(x-1)(x+1)=60
（1-X)²*60=48.6 X
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