来自马翔的问题
【x方-1分之x-4除以(x方+2x+1分之x方-3x-4)加上x-1分之1怎么化简】
x方-1分之x-4除以(x方+2x+1分之x方-3x-4)加上x-1分之1怎么化简
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2020-09-24 21:49
【x方-1分之x-4除以(x方+2x+1分之x方-3x-4)加上x-1分之1怎么化简】
x方-1分之x-4除以(x方+2x+1分之x方-3x-4)加上x-1分之1怎么化简
=(x-4)/(x+1)(x-1)除以(x-4)(x+1)/(x+1)平方+1/(x-1)
=(x-4)/(x+1)(x-1)乘以(x+1)平方/(x-4)(x+1)+1/(x-1)
=(x-4)/(x+1)(x-1)乘以(x+1)/(x-4)+1/(x-1)
=1/(x-1)+1/(x-1)
=2/(x-1)