2(x-2)-3(4x-1)=9(1-x)x=等于多少
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2(x-2)-3(4x-1)=9(1-x)x=等于多少2(x-2)-3(4x-1)=9(1-x)x=等于多少2(x-2)-3(4x-1)=9(1-x)x=等于多少2(x-2)-3(4x-1)=9(1-
2(x-2)-3(4x-1)=9(1-x)x=等于多少
2(x-2)-3(4x-1)=9(1-x)x=等于多少
2(x-2)-3(4x-1)=9(1-x)x=等于多少
2(x-2)-3(4x-1)=9(1-x)
2x-4-12x+3=9-9x
2x-12x+9x=9+4-3
-x=10
x=-10
整理得:2x-4-12x+3=9x-9x2
移项合并 9x2-19x-1=0
2(x-2)-3(4x-1)=9(1-x)x
2x-4-12x+3=9*x-9x*x
-10x-1-9x+9x*x=0
9x*x-19x-1=0
x1= (19+√397)/18=2.16
x2=(19-√397)/18=0.05
因此:(1)2(x-2)-3(4x-1)=9(1-x)x=-22.6
(2)2(x-2)-3(4x-1)=9(1-x)x=-1.5
2(x-2)-3(4x-1)=9(1-x)
2x-4-12x+3=9-9x
2x-12x+9x=9+4-3
x=-10
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