因式分解(a²-4ab+b²)-(6a-12b)+9
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![因式分解(a²-4ab+b²)-(6a-12b)+9](/uploads/image/z/1787872-40-2.jpg?t=%E5%9B%A0%E5%BC%8F%E5%88%86%E8%A7%A3%28a%26%23178%3B-4ab%2Bb%26%23178%3B%29-%286a-12b%29%2B9)
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因式分解(a²-4ab+b²)-(6a-12b)+9
因式分解(a²-4ab+b²)-(6a-12b)+9
因式分解(a²-4ab+b²)-(6a-12b)+9
(a²-4ab+b²)-(6a-12b)+9
=(a-2b)^2-6(a-2b)+9
=(a-2b-3)^2
(a²-4ab+b²)-(6a-12b)+9
=(a-2b)^2-6(a-2b)+9-3b^2
=(a-2b-3)^2-3b^2
=(a-2b-3+√3b)(a-2b-3-√3b)