因式分解计算 621²-148²-769×373
来源:学生作业帮 编辑:搜搜做题作业网作业帮 分类:数学作业 时间:2024/08/13 14:31:33
因式分解计算 621²-148²-769×373
![因式分解计算 621²-148²-769×373](/uploads/image/z/16170358-22-8.jpg?t=%E5%9B%A0%E5%BC%8F%E5%88%86%E8%A7%A3%E8%AE%A1%E7%AE%97+621%26%23178%3B-148%26%23178%3B-769%C3%97373)
621²-148²-769×373
=(621+148)(621-148)-769×373
=769×473-769×373
=769×(473-373)
=769×100
=76900
=(621+148)(621-148)-769×373
=769×473-769×373
=769×(473-373)
=769×100
=76900