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数学
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(9x+8x)(9x-8x)=-1885
人气:418 ℃ 时间:2020-05-17 04:59:17
解答
正常范围下:无解.
因为输入法原因,将X换成m.
(9m+8m)(9m-8m)=-1885
81㎡-72㎡+72㎡-64㎡=-1885
81㎡-64㎡=-1885
17㎡=-1885
㎡=-1885/17
任何数的平方,不可能为负数,所以此题无解.
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