已知x^2+xy=-3,xy+y^2=7,试求x^2+2xy+y^2的值

已知x^2+xy=-3,xy+y^2=7,试求x^2+2xy+y^2的值
2025-05-14 16:34:15
推荐回答(2个)
回答1:


x²+2xy+y²
=(x²+xy)+(xy+y²)
=-3+7
=4

回答2:

7 (-3)=4