已知有理数x,y满足xy=4,x+y=7,则x²y+xy²=()?
已知有理数x,y满足xy=4,x+y=7,则x²y+xy²=()?
已知非零有理数x,y满足x²-4xy+4y²=0,求x-y/x+y-y-x/x+y的值.
已知有理数xy满足(x²+y²)(x²+y²-1)-6=0,则x²+y
若有理数X、Y满足x²-4x+y²+6y+13=0,求xy的值
已知实数x,y满足5x²+2y²+1=6xy+4x-2y,则x²-xy+2000y
已知xy都是正实数且满足4x²+4xy+y²+2x+y-6=0则x(1-y)的最小值
已知x²+y²-8x+6y+25=0,求(x-y+4xy/x-y)(x+y-4xy/x+y)
有理数x,y满足|x+y-3|+(x-y+1)²=0,求(xy²)²X(x²y)
已知有理数x、y、z满足x-y=8,xy+z2= -16怎么解
1、已知有理数x、y、z满足x-y=8,xy+zz= -16
已知实数xy满足x²﹢y²-xy+2x-y+1=0求xy
已知实数x,y满足x²+y²-xy+2x-y+1=0 求x y