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当前位置:首页 >> 2015×2016+2016×2017+2015×2017 >>

2015×2016+2016×2017+2015×2017

假设x=2016,那么 原式=(x-1)x+x(x+1)+(x-1)(x+1) =3x^2-1 将x=2016代入,则 原式=3*2016^2-1=12192767 码字不易,敬请采纳。

结果等于一

2018*2017_2017*2016_2016*2015+2015*2014 =2017x(2018-2016)-2015x(2016-2014) =2017x2-2015x2 =(2017-2015)x2 =2x2 =4

解:2019X2018-2018X2017-2017x2016+2016x2015 =2018*(2019-2017)-2016*(2017-2015) =2018*2-2016*2 =2*(2018-2016) =2*2 =4

2017×2015╱2016 =2016×2015╱2016+1×2015╱2016 =2015+2015╱2016 =2015又2016分之2015

(2017×2015+1)÷2016 =[(2016+1)×(2016-1)+1]÷2016 =(2016²-1²+1)÷2016 =2016²÷2016 =2016

(2014+2015+2016+2017+2018)÷2016 =(2016×5)÷2016 =(2016÷2016)×5 =1×5 =5

解: 原式=2017(2018-2016)-2016(2014+1)+2014 =2017x2-2016x2014-2016+2014 =4034+2014(1-2016)-2016 =4034-2014x2015-2016 =4034- 2014x2015-2015-1 =4033-2015(2014+1) =4033-2015² =4033-4060325 =-4056292

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