化简(a-1)/(a-2)*(a²-4)/(a²-2a+1)÷1/a²-1当分子、分母中含有多项式的乘方时,先分解因式,宰转化为积的乘方.计算：[(x²-2x-8)/(x²+2x+1)]的三次方÷[(x-4)/(x+1)]的四次方*[(x+1)/(x+2)]²先

Question

化简
(a-1)/(a-2)*(a²-4)/(a²-2a+1)÷1/a²-1
当分子、分母中含有多项式的乘方时,先分解因式,宰转化为积的乘方.
计算：[(x²-2x-8)/(x²+2x+1)]的三次方÷[(x-4)/(x+1)]的四次方*[(x+1)/(x+2)]²
先化简再求值
a/(a-1)÷[(a²-a)/(a²-1)]*1/2,其中a=1/2
先约分再化简
(x²-y²)/(x+y)-[4x(x-y)+y²)]/(2x-y)

Answer 1

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