求部骤:202²+198²
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/05 06:14:22
![求部骤:202²+198²](/uploads/image/z/746876-20-6.jpg?t=%E6%B1%82%E9%83%A8%E9%AA%A4%EF%BC%9A202%26%23178%3B%2B198%26%23178%3B)
求部骤:202²+198²
求部骤:202²+198²
求部骤:202²+198²
(200+2)^2+(200-2)^2=200^2+2×200×2+2^2+200^2-2×200×2+2^2=2×200^2+2×2^2=80008
202²+198²
=(202+198)² - 2*202*198
=160000 - 404*(200-2)
=160000-80800+808
=80008