1.2345^2+0.7655^2+2.496*0.7655注:此题中"2"指平方.
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1.2345^2+0.7655^2+2.496*0.7655注:此题中"2"指平方.1.2345^2+0.7655^2+2.496*0.7655注:此题中"2"指平方.1.2345^2+0.7655^
1.2345^2+0.7655^2+2.496*0.7655注:此题中"2"指平方.
1.2345^2+0.7655^2+2.496*0.7655
注:此题中"2"指平方.
1.2345^2+0.7655^2+2.496*0.7655注:此题中"2"指平方.
4.0206685
1.2345^2+0.7655^+2.496*0.7655
=(1.2345+0.7655)^2-2*1.2345*0.7655+2.496*0.7655
=4-(2.469-2.469)*0.7655
=4
其实这个题目就只是考你这个公式的应用：
(a+b)^2=a^2+2ab+b^2
(1+0.2345)(1+0.2345)+(1-0.2345)(1-0.2345)+2.496*(1-0.2345)
=1+2*0.2345+0.2345*0.2345+1-2*0.2345+0.2345*0.2345+2.496-2.496*0.2345
=4.496+2*0.2345*0.2345-2.496*0.2345
=4.496+0.2345(0.469-2.4...
全部展开
(1+0.2345)(1+0.2345)+(1-0.2345)(1-0.2345)+2.496*(1-0.2345)
=1+2*0.2345+0.2345*0.2345+1-2*0.2345+0.2345*0.2345+2.496-2.496*0.2345
=4.496+2*0.2345*0.2345-2.496*0.2345
=4.496+0.2345(0.469-2.496)
=4.496-2.027*0.2345
=4.0206685?？？
检查一下你的题目，应该有点问题，是不是把2.469写成2.496呢？
如果题目原本是2.469，那结果很容易算，结果是4.
收起
1.2345^2+0.7655^2+2.469X0.7655
求:1.2345^2+2.469*0.7655+0.7655^2 用公式法
1.2345^2+0.7655^2+2.469*0.7655,求详细过程,谢谢!
初一简便计算1.2345^2+0.7655^2+2.469*0.7655
计算题:1.2345^5+0.7655^2+2.469*0.76552345^5+0.7655^2+2.469*0.7655
1.2345^2+0.7655^2+2.469x0.7655=?
1.2345＾2+（0.7655）＾2+2.469×0.7655-2.5＾2
1.2345^2+0.7655^2+2.496*0.7655注:此题中2指平方.
1.2345的2次方+0.7655的2次方+2.469乘0.7655等于多少?十万火急!
1.2345^2+0.7655^2+2.469乘0.7655用简便方法做
一道初中de 简便运算数学题简便运算1.2345^2*0.7655^2+7.469*0.7655
1.2345的平方+07655的平方+2.469×0.76551.2345的平方+0.7655的平方+2.469x0.7655=1.2345²+0.7655²+2×1.2345×0.7655=(1.2345+0.7655)²=2²=4答案是这样,但是为什么1.2345²+0.7655²+2×1.2345×0.7655可以转化
初二上学期...整式的乘法..1.2345²+0.7655²+2.469*0.7655=1.2345²+2*1.2345*0.7655+0.7655 这步我还明白..=(1.2345+0.7655)² 到这步我就乱了...他少说了一步,自学不易..麻烦详细说下..=2²=4...他少
2道算术题2005的平方＝?1.2345的平方+0.7655的平方+2.469×0.7655＝?这两道题有简便运算吗?怎么算啊
1.2345²+0.7655²+2.469×0.7655
计算1.2345²+2.469×0.7655+0.7655²
1.2345*0.2345*3-1.2345平方+0.7655*0.469
完全平房和平方差1） （x-2y+3z)^2=2) (x-2)(2x+1)-3(2x-1)^2=3) 1.2345^2+0.7655^2+2.469*0.7655