8(x²-2y²)-x(7x+y)+xy = (x²+5x+3)(x²+5x-2
化简 (x+y)(x²-xy+y²) ; 3(2x-1)(x+6)-5(x-3)(x+6)
x-y/x²÷x²-2xy+y²/xy*(xy-x²)
已知(x+3)+丨X-y+10丨=0 ,求5x²y-[2x²y-(3xy-xy²)-3x&
分解因式8(x²-2y²)-x(7x+y)+xy=
2x²-3xy=y²=0(x,y不得o)求x/y+y/x
计算3x/8y×16y²/27x² (2xy-x²)÷x-2y/xy 2x-6/x
已知:(x+2)²+|x+y-10|=0,求3x²y-[5x²y-﹙2xy-x²
分解因式:8(x²-2y²)-x(7x+y)+xy
已知x²+y²-8x+6y+25=0,求(x-y+4xy/x-y)(x+y-4xy/x+y)
(3x-y)²-2x(4x-5y)-(x+2y)²
化简(3X²-XY+Y²)-5(X²-XY+2Y²)
化简求值[1-(2x/x+y)]÷ (x²-2xy+y²/3x+3y)+(x²+xy/x&