x+y=5;-xy=6
已知x-y=3xy,且xy不等于0,则-3x+6xy+3y/(7x-5y)-9xy-(3x-y)
若x-y=5,xy=6,求x^2-xy^2和x^2y+xy^2
xy=6,x-y=5,x^2y+xy^2
x*-2xy+3y*=9 4x*-5xy+6y*=30
若x+y=5,xy=6,求x^2y+xy^2的值
已知X+Y=6,xy=3求代数式(5XY+4X+7Y)+(6X-3XY)-(4XY-3Y)的值
已知x+y=3,xy=1,求代数式5xy+4x+7y+6x-3xy-4xy+3y的值.
x-y=3,xy=5,求代数式(7xy+4x-7y)+(6x-3xy)-(3y+4xy)的值
x+y=8,xy=-2,求(5xy+4x+7y)+(6x-3xy)-(4xy-3y)的值
已知x>0,y>0,且x+6y=5根号xy,求(2x+根号xy-y)分之(x+根号xy+2y)的值
√x(√x+2√y)=√y(6√x+5√y,求x-3√xy+2y/x+√xy-6y
∫x(∫x+2∫y)=∫y(6∫x+5∫y),求:(x+∫xy-y)/(2x+∫xy+3y)