x+y=m xy=n,求(x-y)²和x²+y²
来源:学生作业帮助网 编辑:六六作业网 时间:2024/12/24 02:27:34
x+y=mxy=n,求(x-y)²和x²+y²x+y=mxy=n,求(x-y)²和x²+y²x+y=mxy=n,求(x-y)²和x
x+y=m xy=n,求(x-y)²和x²+y²
x+y=m xy=n,求(x-y)²和x²+y²
x+y=m xy=n,求(x-y)²和x²+y²
解: x+y=m xy=n
(x-y)²
=(x+y)²-4xy
=m²-4n
x²+y²
=(x+y)²-2xy
=m²-2n
祝你开心
(x-y)²=(x+y)^2-4xy=m^2-4n
x²+y²=(x+y)^2-2xy=m^2-2n
(x-y)²=(x+y)²-4xy=m²-4n
x²+y²=(x+y)²-2xy=m²-2n
规范化规范化广泛