分式计算:
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分式计算:分式计算:分式计算:=x(x+2)/(x+2)(x-2)-2/(x-2)=x/(x-2)-2/(x-2)=(x-2)/(x-2)=1(x²+2x)/(x²-4)-2/(x
分式计算:
分式计算:
分式计算:
=x(x+2)/(x+2)(x-2)-2/(x-2)
=x/(x-2)-2/(x-2)
=(x-2)/(x-2)
=1
(x²+2x)/(x²-4)-2/(x-2)=(x²+2x)/(x²-4)-2(x+2)/[(x-2)(x+2)]=(x²+2x)/(x²-4)-(2x+4)/(x²-4)
=[(x²+2x)-(2x+4)]/(x²-4)=(x²+2x-2x-4)/(x²-4)=(x²-4)/(x²-4)=1