鑻2+xy=2,y虏+xy=3锛屽垯x虏+2xy+y虏=

来源:学生作业帮助网 编辑:作业帮 时间:2024/11/09 03:57:18

鑻2+xy=2,y虏+xy=3锛屽垯x虏+2xy+y虏=
鑻2+xy=2,y虏+xy=3锛屽垯x虏+2xy+y虏=

鑻2+xy=2,y虏+xy=3锛屽垯x虏+2xy+y虏=
x²+2xy+y²
=x²+xy+xy+y²
=(x²+xy)+(xy+y²)
=2+3
=5