已知x-3y=0,求(2x+y)(x-y)/x^2-2xy+y^2的值
来源:学生作业帮 编辑:搜搜做题作业网作业帮 分类:数学作业 时间:2024/07/05 22:14:07
已知x-3y=0,求(2x+y)(x-y)/x^2-2xy+y^2的值
(2x+y)(x-y)
已知x-3y=0,求 ————— 的值
x²-2xy+y²
(2x+y)(x-y)
—————
x²-2xy+y²
(2x+y)(x-y)
已知x-3y=0,求 ————— 的值
x²-2xy+y²
(2x+y)(x-y)
—————
x²-2xy+y²
![已知x-3y=0,求(2x+y)(x-y)/x^2-2xy+y^2的值](/uploads/image/z/8172443-11-3.jpg?t=%E5%B7%B2%E7%9F%A5x-3y%3D0%2C%E6%B1%82%282x%2By%29%28x-y%29%2Fx%5E2-2xy%2By%5E2%E7%9A%84%E5%80%BC)
x-3y=0
x=3y
原式=(2x+y)(x-y)/(x²-2xy+y²)
=(2×3y+y)(3y-y)/[(3y)²-2×3y×y+y²]
=7y×2y/(9y²-6y²+y²)
=14y²/(4y²)
=7/2
x=3y
原式=(2x+y)(x-y)/(x²-2xy+y²)
=(2×3y+y)(3y-y)/[(3y)²-2×3y×y+y²]
=7y×2y/(9y²-6y²+y²)
=14y²/(4y²)
=7/2
已知x*x-4xy+4y*y=0 求[2x(x+y)-y(x+y)]/(4x*x-4xy+y*y)的值?
已知3x*+xy-2y*=0,求(x/y)-(y/x)-(x*+y*)/(xy)的值.*是平方
已知x-3y=0,求(2x+y)/(x^2-2xy+y^2)*(x-y)的值
已知x-3y=0,求(2x+y)/(x^2-2xy+y^2)*(x-y)的值.
已知x-3y=0,求(2x+y)(x-y)/x^2-2xy+y^2的值
已知x-3y=0,求2x+y/x-2xy+y乘(x-y)的值
已知y-x-2xy=0,求3x+xy-3y/y-xy-x的值
已知y-x-2xy=0,求(3x+xy-3y)\(y-xy-x)的值
已知x^2+y^2+xy-3y+3=0,求y^x的值
已知x^2+3xy-4y^2=0(y≠0),求x-y/x+y的值.
已知x-3y=0,求(x²-2xy+y²/x-y)-2y的值
已知2x^2-3xy+y^2=0,xy不等于零,求x/y+y/x的值