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X1 X2 (X1,X2) (X1,X2,X3,X4)
2x-4-12x+3=9,-10x=9-4+3,故x=0.8 ; 2x-4-12x+3=9,-10x=9+4-3,故x=-1 ; 2x-4-12x-3=9,-10x=9+4+3,故x=-1.6; 2x-2-12x+1=9,-10x=9+2-1,故x=-1 ;
4x+1-10x+1=1 4x+2-10x-1=1 4x+2-10x-1=6 4x+2-10x+1=6
4x+1-10x+1=1 4x+2-10x+1=1 4x+2-10x-1=6 4x+2-10x+1=6
4x+2﹣10x+1=6 4x+2﹣10x﹣1=1 4x+2﹣10x﹣1=6 4x+1﹣10x+1=1
X1 X2 (X1,X2) (X1,X2,X3,X4)
2x+1-10x-1=1 4x+2-10x-1=6 4x+2-10x+1=1 4x+2-10x+1=6
﹣2x+2﹣4x﹣8=1 ﹣2x+1﹣4x+2=1 ﹣2x﹣2﹣4x﹣8=1 ﹣2x+2﹣4x+8=1
X1 X2 (X1,X2) (X1,X2,X3,X4)
4x+3x=1-2 4x-3x=-2-1 4x-3x=2-1 4x+3x=-2-1
4x+1-10x+1=1 4x+2-10x+1=1 4x+2-10x-1=6 4x+2-10x+1=6
x-2x-1=4 x-2x+1=4 x-2x+2=4 x-2x-2=4
x2=-2,解方程,得x=± (x-2)2=4,解方程,得x-2=2,x=4 4(x-1)2=9,解方程,得4(x-1)=±3,x1=,x2= (2x+3)2=25,解方程,得2x+3=±5,x1=1,x2=-4
2x+1﹣(10x+1)=1 4x+1﹣10x+1=6 4x+2﹣10x﹣1=6 2(2x+1)﹣(10x+1)=1
2x+1﹣(10x+1)=1 4x+1﹣10x+1=6 4x+2﹣10x﹣1=6 2(2x+1)﹣(10x+1)=1