3ax²+6axy+3ay² (a+b)²-12(a+b)+363ax²+6axy+3ay²(a+b)²-12(a+b)+36
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![3ax²+6axy+3ay² (a+b)²-12(a+b)+363ax²+6axy+3ay²(a+b)²-12(a+b)+36](/uploads/image/z/4534428-12-8.jpg?t=3ax%26%23178%3B%2B6axy%2B3ay%26%23178%3B+%EF%BC%88a%2Bb%EF%BC%89%26%23178%3B-12%EF%BC%88a%2Bb%EF%BC%89%2B363ax%26%23178%3B%2B6axy%2B3ay%26%23178%3B%EF%BC%88a%2Bb%EF%BC%89%26%23178%3B-12%EF%BC%88a%2Bb%EF%BC%89%2B36)
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3ax²+6axy+3ay² (a+b)²-12(a+b)+363ax²+6axy+3ay²(a+b)²-12(a+b)+36
3ax²+6axy+3ay² (a+b)²-12(a+b)+36
3ax²+6axy+3ay²
(a+b)²-12(a+b)+36
3ax²+6axy+3ay² (a+b)²-12(a+b)+363ax²+6axy+3ay²(a+b)²-12(a+b)+36
等下