-9x²-y²+6xy
已知2x²+xy=10,3y²+2xy=6,求4x²+8xy+9y²的值
x/y=2,求分式x²-xy+3y²/x²+xy+6y²
几道数学小题6xy²-9x²y-y³=___________32a(x²+x)&
1-x²+2xy-y²
3x²-4xy+y²
x²+6XY+9Y²-2X-6Y+1因式分解
(3x+2y)(9x²-6xy+4y²﹚
已知X²-5XY+6Y²=0,求(X²+3XY)\2Y²的值
已知(x²+y²)(x²+y²-6)+9=0 ,求x²+y²
已知:x²+y²=4x+6y+13=0.求x²-6xy+9y²的值
若x²+y²-4x+6y+13=0,则x²+6xy+9y²=( )
已知4x²+y²-4x+6y+10=0,怎么求4x²-12xy+9y²