(a²+2ab+3b²)·2ab,(a²+2ab+3b²)·2ab,怎么算都感觉有一步错了,
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![(a²+2ab+3b²)·2ab,(a²+2ab+3b²)·2ab,怎么算都感觉有一步错了,](/uploads/image/z/7624957-13-7.jpg?t=%EF%BC%88a%26%23178%3B%2B2ab%2B3b%26%23178%3B%EF%BC%89%C2%B72ab%2C%EF%BC%88a%26%23178%3B%2B2ab%2B3b%26%23178%3B%EF%BC%89%C2%B72ab%2C%E6%80%8E%E4%B9%88%E7%AE%97%E9%83%BD%E6%84%9F%E8%A7%89%E6%9C%89%E4%B8%80%E6%AD%A5%E9%94%99%E4%BA%86%2C)
(a²+2ab+3b²)·2ab,(a²+2ab+3b²)·2ab,怎么算都感觉有一步错了,
(a²+2ab+3b²)·2ab,
(a²+2ab+3b²)·2ab,怎么算都感觉有一步错了,
(a²+2ab+3b²)·2ab,(a²+2ab+3b²)·2ab,怎么算都感觉有一步错了,
(a²+2ab+3b²)·2ab
=2a³b+4a²b²+6ab³
=2a^3b+4a^2b^2+6ab^3