分解因式:(a²-1)²+6(1-a²)+9
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分解因式:(a²-1)²+6(1-a²)+9
分解因式:(a²-1)²+6(1-a²)+9
分解因式:(a²-1)²+6(1-a²)+9
(a²-1)²+6(1-a²)+9
=(a²-1)²-6(a²-1)+9
=(a²-1-3)²
=(a²-4)²
=(a+2)²(a-2)²;
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(a²-1)²+6(1-a²)+9
=(a²-1)²-6(a²-1)+9
=(a²-1-3)²
=(a²-4)²
=(a+2)²(a-2)²