已知x=1/2a+1,y=1/2a+a,z=a-3,求x2+2xy+y2-2xz+z2-2yz问题错了 已知x=1/2a+1,y=1/2a+2,z=a-3,求x2+2xy+y2-2xz+z2-2yz的值 ,答案是36
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/17 02:46:56
![已知x=1/2a+1,y=1/2a+a,z=a-3,求x2+2xy+y2-2xz+z2-2yz问题错了 已知x=1/2a+1,y=1/2a+2,z=a-3,求x2+2xy+y2-2xz+z2-2yz的值 ,答案是36](/uploads/image/z/8328280-40-0.jpg?t=%E5%B7%B2%E7%9F%A5x%3D1%2F2a%2B1%2Cy%3D1%2F2a%2Ba%2Cz%3Da-3%2C%E6%B1%82x2%2B2xy%2By2-2xz%2Bz2-2yz%E9%97%AE%E9%A2%98%E9%94%99%E4%BA%86+%E5%B7%B2%E7%9F%A5x%3D1%2F2a%2B1%2Cy%3D1%2F2a%2B2%2Cz%3Da-3%2C%E6%B1%82x2%2B2xy%2By2-2xz%2Bz2-2yz%E7%9A%84%E5%80%BC+%EF%BC%8C%E7%AD%94%E6%A1%88%E6%98%AF36)
x){}K+l
u*!D*D]cg***+t*Te^.r'`߄Z6Qx)v<&H<uUv61?oQ]lhnakTiWA`e`U(B'hCm*m"h[ 5ã 1, ^-.
已知x=1/2a+1,y=1/2a+a,z=a-3,求x2+2xy+y2-2xz+z2-2yz问题错了 已知x=1/2a+1,y=1/2a+2,z=a-3,求x2+2xy+y2-2xz+z2-2yz的值 ,答案是36
已知x=1/2a+1,y=1/2a+a,z=a-3,求x2+2xy+y2-2xz+z2-2yz
问题错了 已知x=1/2a+1,y=1/2a+2,z=a-3,求x2+2xy+y2-2xz+z2-2yz的值 ,答案是36
已知x=1/2a+1,y=1/2a+a,z=a-3,求x2+2xy+y2-2xz+z2-2yz问题错了 已知x=1/2a+1,y=1/2a+2,z=a-3,求x2+2xy+y2-2xz+z2-2yz的值 ,答案是36
原式=(x+y)²-2z(x+y)+z²
=(x+y-z)²
=(1/2a+1+1/2a+a-a+3)²
=(a+4)²
=a²+8a+16