(1)2/x-1+x+1/1-x (2)x+3/3-x+x²-9/x²+6x+9 (3)a+2-4/2-a
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(1)2/x-1+x+1/1-x(2)x+3/3-x+x²-9/x²+6x+9(3)a+2-4/2-a(1)2/x-1+x+1/1-x(2)x+3/3-x+x²-9/x&
(1)2/x-1+x+1/1-x (2)x+3/3-x+x²-9/x²+6x+9 (3)a+2-4/2-a
(1)2/x-1+x+1/1-x (2)x+3/3-x+x²-9/x²+6x+9 (3)a+2-4/2-a
(1)2/x-1+x+1/1-x (2)x+3/3-x+x²-9/x²+6x+9 (3)a+2-4/2-a
(1)2/x-1+x+1/1-x
=2/(x-1)-(x+1)/(x-1)
=(2-x-1)/(x-1)
=(1-x)/(x-1)
=-1
(2)x+3/3-x+x²-9/x²+6x+9
=(3+x)/(3-x)+(x-3)(x+3)/(x+3)²
=(3+x)/(3-x)-(3-x)/(3+x)
=[(3+x)²-(3-x)²]/(3-x)(3+x)
=12x/(9-x²)
(3)a+2-4/2-a
=(a+2) +4/(a-2)
=(a²-4+4)/(a-2)
=a²/(a-2)
*-----------------------------------------------*| 6 4 X | 8 X X | X X 5 || X X X | X X X | X 7 8 || X X X | X X X | X X X ||---------------+---------------+--------------- || X X X | X X X | 5 1 X || X X X | X 6 X | X X X || 8 X X | 3 5 X | 2 X X ||
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分解因式----（X*X-X)(X*X-X-2)+1
】x(x+1)+x^2(x-1)
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x-1/x-2
{2X+1}+{X}
(x^2-1)/x
x^2-1/x
2X+|X+1|
｜x-1｜+｜x-2｜
(x+1)/(x+2)
/X+1/+/X+2/
2x/(1-x)
|X+2|+|X-1|
2x-1 (x
|x-2|+|x-1|