已知:2X-Y等于2010,求式子((X^2+Y^2)-(X-Y)^2+2Y(X-Y))除以4Y的值.
已知:2X-Y等于2010,求式子((X^2+Y^2)-(X-Y)^2+2Y(X-Y))除以4Y的值.
已知2x-y除以x+y等于2,求代数式(4x-2y除以x+y)-(4x+4y除以2x-y)的值
已知x-y除以x+2y等于三分之一,求x-2y除以x+y的值
已知2x-y=4022 求式子[(x的平方+y的平方)-(x-y)的平方+2y(x-y)]除4y的值
{(z+y)(x-y)-(x-y)的2次方+2y(x-y)}除以4y
已知x-y除以x+y=3,求代数式x+y分之2(x-y)-3(x-y)分之x+y的值.
已知x*x-4xy+4y*y=0 求[2x(x+y)-y(x+y)]/(4x*x-4xy+y*y)的值?
已知2x-y=10,求式子[(x^2+y^2)-(x-y)^2+2y(x-y)]/4y (4xy-2y²)/4
【(x-y)^2+(x+y)(x-y)】除以 2x
已知x-2y=2016,求[(3x+2y)(3x-2y)-(x+2y)(5x-2y)]除以8x的值
已知 2x-y=10,求【(x^2+y^2(-(x-y)^2+2y(x-y)】除以y的值
已知 2x-3y/y等于2 求x-y/2x 求x-3y/2x+y