分解因式(a²+b²)²-4a²b² (2) (1/36a-1/3)a+1
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分解因式(a²+b²)²-4a²b² (2) (1/36a-1/3)a+1
分解因式(a²+b²)²-4a²b² (2) (1/36a-1/3)a+1
分解因式(a²+b²)²-4a²b² (2) (1/36a-1/3)a+1
(a²+b²)²-4a²b²
=(a²+b²)²-(2ab)²
=(a²+b²+2ab)(a²+b²-2ab)
=(a+b)²(a-b)²
(1/36a-1/3)a+1
=1/36a²-1/3a+1
=(1/6a)²-2*1/6a+1
=(1/6a-1)²
(1)(a²+b²)²-4a²b²
=[(a²+b²)+2ab ]*[(a²+b²)-2ab ]
=(a+b)²(a-b)²
(2) (1/36a-1/3)a+1
=1/36a²-1/3a+1
=(1/6a-1)²