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2018x2017一2017怎么算

2018x2017-2017 =2017x2018-2017×1 =2017×(2018-1) =2017×2017 =2017² =4068289

2017x2017一2018x2016 =2017x2017-(2017+1)x(2017-1) =2017x2017-2017x2017+1 =1

2016*2016/2017+2017*2017/2018-4035/(2017*2018) =(2017-1)*2016/2017+(2018-1)*2017/2018-(2017+2018)/(2017*2018) =2017*2016/2017-2016/2017+2018*2017/2018-2017/2018-1/2017-1/2018 =2016-2016/2017+2017-2017/2018-1/2017-1/20...

(201720172017-20172017-2017)/(201820182018-20182018-2018) =[2017×(100010001-10001-1)]/[2018×(100010001-10001-1)] =2017/2018

x²-2017x-2018=0 解:(x-2018)(x+1)=0 x-2018=0 x+1=0 解得,x=2018;或x= -1

简便计算 (2017x2018-2019)÷(2017+2018x2015) =(2015x2018+2×2018-2019)÷(2017+2018x2015) =(2015x2018+4036-2019)÷(2017+2018x2015) =(2015x2018+2017)÷(2017+2018x2015) =1

2018-2017×2018 =2018×(1-2017) =2018×(-2016) =-2018×2016

答案是1. 题意是2017²-(2017-1)×(2017+1)=2017²-(2017²-1²)=2017²-2017²+1²=1

2017x2017/2018怎麼列式计算 2017x2017/2018 =2017*(1-1/2018) =2017-2017/2018 =2016+1/2018 =2016又1/2018

2017²-2016×2018 =2017²-(2017-1)(2017+1) =2017²-(2017²-1) =2017²-2017²+1 =1

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