1.234的平方加0.766的平方加2.468成0.766怎么简便运算
问题描述:
1.234的平方加0.766的平方加2.468成0.766怎么简便运算
答
1.234² + 0.766² +2.468×0.766
= 1.234² + 2×1.234×0.766+ 0.766²
= (1.234 + 0.766)²
= 2²
= 4