(3a的n+3次方+6a的n+2次方-9a的n+1次方)÷3a的n-1次方
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(3a的n+3次方+6a的n+2次方-9a的n+1次方)÷3a的n-1次方(3a的n+3次方+6a的n+2次方-9a的n+1次方)÷3a的n-1次方(3a的n+3次方+6a的n+2次方-9a的n+1次
(3a的n+3次方+6a的n+2次方-9a的n+1次方)÷3a的n-1次方
(3a的n+3次方+6a的n+2次方-9a的n+1次方)÷3a的n-1次方
(3a的n+3次方+6a的n+2次方-9a的n+1次方)÷3a的n-1次方
(3a的n+3次方+6a的n+2次方-9a的n+1次方)÷3a的n-1次方 =3a的n-1次方*(a4次方+2a3次方-3a2次方)÷3a的n-1次方 =a2次方*(a-3)(a+1)
(3a的n+3次方+6a的n+2次方-9a的n+1次方)÷3a的n-1次方
计算(3a的n+1次方-6a的n次方+9a的n-1次方)除以(3分之1a的n-2次方)
6a的n+2次方+3a的n+1次方-9a的n次方除以3a的n-1次方
(3a的n-1次方-6a的n次方+9a的n-1次方)除以(三分之一a的n-2次方)
(3a的n+1次方-6a的n次方+9a的n-1次方)/(三分之一a的n-2次方 ) 急呀 着急
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a的n次方-a的n次方+1/a的n+2次方-3a的n+1次方+2a的n次方a的n次方-a的n次方+1_________________a的n+2次方-3a的n+1次方+2a的n次方
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