已知x^2+y^2-6x-4y+13=0,求(2x-y)^2-2(2x-y)(x+2y)+(x+2y)^2的值是-4y 别到处复制给我
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/30 01:50:36
![已知x^2+y^2-6x-4y+13=0,求(2x-y)^2-2(2x-y)(x+2y)+(x+2y)^2的值是-4y 别到处复制给我](/uploads/image/z/2484432-0-2.jpg?t=%E5%B7%B2%E7%9F%A5x%5E2%2By%5E2-6x-4y%2B13%3D0%2C%E6%B1%82%282x-y%29%5E2-2%282x-y%29%28x%2B2y%29%2B%28x%2B2y%29%5E2%E7%9A%84%E5%80%BC%E6%98%AF-4y+%E5%88%AB%E5%88%B0%E5%A4%84%E5%A4%8D%E5%88%B6%E7%BB%99%E6%88%91)
已知x^2+y^2-6x-4y+13=0,求(2x-y)^2-2(2x-y)(x+2y)+(x+2y)^2的值是-4y 别到处复制给我
已知x^2+y^2-6x-4y+13=0,求(2x-y)^2-2(2x-y)(x+2y)+(x+2y)^2的值
是-4y 别到处复制给我
已知x^2+y^2-6x-4y+13=0,求(2x-y)^2-2(2x-y)(x+2y)+(x+2y)^2的值是-4y 别到处复制给我
x^2+y^2-6x-4y+13=0
(x-3)^2+(y-2)^2=0
x-3=0 x=3
y-2=0 y=2
(2x-y)^2-2(2x-y)(x+2y)+(x+2y)^2
=[(2x-y)-(x+2y)]^2
=(x-3y)^2
x=3,y=2
=(3-2*3)^2
=9
希望能够帮助你!