化简：x^2 + 6x + 4y^2 + 8y + 4 = 0

来源：学生作业帮助网编辑：作业帮时间：2024/05/02 22:02:38

化简：x^2 + 6x + 4y^2 + 8y + 4 = 0
化简：x^2 + 6x + 4y^2 + 8y + 4 = 0

化简：x^2 + 6x + 4y^2 + 8y + 4 = 0
x^2 + 6x + 4y^2 + 8y + 4
=(x+3)^2-9+(2y+2)^2-4+4
=(x+3)^2+(2y+2)^2-9=0