分式计算2道a²-4/4-2ax/x²-1 + 3x+1/x²-1 +2x+3/ 1-x²
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分式计算2道a²-4/4-2ax/x²-1 + 3x+1/x²-1 +2x+3/ 1-x²
分式计算2道
a²-4/4-2a
x/x²-1 + 3x+1/x²-1 +2x+3/ 1-x²
分式计算2道a²-4/4-2ax/x²-1 + 3x+1/x²-1 +2x+3/ 1-x²
a²-4/4-2a
=(a+2)(a-2)/-2(a-2)
=-(a+2)/2
x/x²-1 + 3x+1/x²-1 +2x+3/ 1-x²
=x/x²-1 + 3x+1/x²-1 -(2x+3)/x²-1
=(x+3x+1-2x-3)/(x²-1)
=(2x-2)/(x²-1)
=2(x-1)/(x+1)(x-1)
=2/(x+1)