化简求值:(2a-3b)²-2(2a+3b)(2a-3b)+(2a+3b)² 先回答,化简求值:(2a-3b)²-2(2a+3b)(2a-3b)+(2a+3b)²,其中a=-2,b=1/3.
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![化简求值:(2a-3b)²-2(2a+3b)(2a-3b)+(2a+3b)² 先回答,化简求值:(2a-3b)²-2(2a+3b)(2a-3b)+(2a+3b)²,其中a=-2,b=1/3.](/uploads/image/z/250246-46-6.jpg?t=%E5%8C%96%E7%AE%80%E6%B1%82%E5%80%BC%EF%BC%9A%282a-3b%29%26%23178%3B-2%282a%2B3b%29%282a-3b%29%2B%282a%2B3b%29%26%23178%3B+%E5%85%88%E5%9B%9E%E7%AD%94%2C%E5%8C%96%E7%AE%80%E6%B1%82%E5%80%BC%EF%BC%9A%282a-3b%29%26%23178%3B-2%282a%2B3b%29%282a-3b%29%2B%282a%2B3b%29%26%23178%3B%2C%E5%85%B6%E4%B8%ADa%3D-2%2Cb%3D1%2F3.)
化简求值:(2a-3b)²-2(2a+3b)(2a-3b)+(2a+3b)² 先回答,化简求值:(2a-3b)²-2(2a+3b)(2a-3b)+(2a+3b)²,其中a=-2,b=1/3.
化简求值:(2a-3b)²-2(2a+3b)(2a-3b)+(2a+3b)² 先回答,
化简求值:(2a-3b)²-2(2a+3b)(2a-3b)+(2a+3b)²,其中a=-2,b=1/3.
化简求值:(2a-3b)²-2(2a+3b)(2a-3b)+(2a+3b)² 先回答,化简求值:(2a-3b)²-2(2a+3b)(2a-3b)+(2a+3b)²,其中a=-2,b=1/3.
原式
(2a-3b)²-2(2a+3b)(2a-3b)+(2a+3b)²
=[(2a-3b)-(2a+3b)]²
=(-6b)²
=36b²
=36*1/9
=4