1.2-5x+x*x2.2x*x-5x+13.x*x-3/2*x-24.-x*x-4x+3
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1.2-5x+x*x2.2x*x-5x+13.x*x-3/2*x-24.-x*x-4x+3
(x-2)(x2-6x-9)-x(x-5)(x-3)其中x= -1/3
(x-2) (x2-2x+5)?
5(x2-x)=3(x2+x)
(-x 2x2-3 x 1) 2(x 2x -5)-(4x2-3x 5 x 1)的计算
(1)2/x-3=3/x(2)5x+2/x2+x=3/x+1(3)x/x2-x+2=2x/x+1
1-1/(x2+7x+6)=(x2-5x+5)/(x 2-5x+6)
解方程5-x/x2-3x+2=5-x/x2-7x+h
x2-5x+6
x2-5x+6
x2-5x+8
3x2+5x
(-2x)*(x2-5x+6)-4x(2x2-3x+1)
-2x2-5x+-2x2-5x+3
(-x2+5+4x)+(5x-4+2x2)
(-x2+5+4x)+(5x-4+2x2)
1.18-2(3-4X)=10X2.X/2-X=(X+5)-2X