xy=9,x-y=-3,则xx+3xy+yy等于多少

xy=9,x-y=-3,则xx+3xy+yy等于多少 已知xx+y=5,xy=-3,则x^2y+xy^2= x,+y=5 xy=3 求xx+yy 已知x(x-1)-(xx-y)=-3求xx+yy-2xy 已知x（x+1)-(xx+y)=3,求(xx+yy)/2-xy的值 x(x+1)-(xx+y)=-3,求(xx+yy)/2-xy的值 已知2x=3y,求xy/xx+yy-yy/xx-yy的值 x-y=3,(x+y)(x+y)=25,求xy/xx+yy的值? x-y/x+y=2,则xx+2xy+yy/4xy=? xx+xy=xy,xy 已知x-y=3xy,且xy不等于0,则-3x+6xy+3y/(7x-5y)-9xy-(3x-y) 已知：x²-xy=9,xy-y²=5,则x²-2xy+y²=（）,3x²+xy-2y²+（） 已知x+y=12,xy=9,求(x+3xy+y)/(xy+xy)的值 x*x+xy=3,xy+y*y=2,则x*x+2xy+y*y=________? xy=9,x-y=-3,则x平方+3xy+y平方=? xy=9,x-y=-3则x²+3xy+y²= 已知xy=9,x-y=-3,则x+3xy+y的值为? 已知A=2XX+3XY-1,B=-XX+XY-1,且3A+6B的值与X无关,求Y值