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数学
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计算:(1)(5a-3b)+(a-2b) (2) -3(2xy-y)-2xy (3) (x²-y²)-3(2x²-3y²
咋都没人回答 大哥大姐
人气:361 ℃ 时间:2020-03-23 06:37:46
解答
1 、6a-5b
2 、y(3-8x)
3 、8y²-5x²过程呢详情请见课本去括号公式!
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