解: 10 7 2 (x+y) ÷(-x-y) ÷(x+y)求过程
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解:1072(x+y)÷(-x-y)÷(x+y)求过程解:1072(x+y)÷(-x-y)÷(x+y)求过程解:1072(x+y)÷(-x-y)÷(x+y)求过程10*7*2(x+y)÷(-x-y)÷
解: 10 7 2 (x+y) ÷(-x-y) ÷(x+y)求过程
解: 10 7 2 (x+y) ÷(-x-y) ÷(x+y)
求过程
解: 10 7 2 (x+y) ÷(-x-y) ÷(x+y)求过程
10 * 7 * 2 (x+y) ÷(-x-y) ÷(x+y)
=140 * (X+Y) *[ -1 / (X+Y)] * 1/ (X+Y)
= -140 / (X+Y)
最后的x+y换成乘以它的倒数,约分后等于1072除以(-x-y),等于-1072/(x+y)
1072(x+y)/(-x-y)/(x+y)
=1072(x+y)/-(x+y)/(x+y) 提取负号
=-1072/(x+y) 两个x+y消掉
1072(x+y)/(-x-y)/(x+y)
=1072(x+y)/-(x+y)/(x+y) 提取负号
=-1072/(x+y)
解: 10 7 2 (x+y) ÷(-x-y) ÷(x+y)求过程
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