2x^2-xy-15y^22x^2-5x-12

（x^2+xy/x-y)/（xy/x-y)计算 因式分解 x-xy+3y-3x 2x+xy-y-4x+5y-6 因式分解30题(要过程)am+an+bm+bn x^2+5y-xy-5x x2+xy+2xz+x (a+b)x-(b+a)y -12x(x-y)-(y-x)x^2 2x^2+4x+2 x(x+z)-y(y+z) 2(x^2-3ab)+x(4a-3b) 4x^2+12xy+9y^2-25 x^4-16 16x^4-1 x^2+9x+8 x^2-10xy+24y^2 2x^2+15xy-8y^2 3x^2-6xy+3y^2 24x^2+22x-21 -x^2+4xy- 化简：3x^2-[5xy-(x^y-3xy)+4x^2y-8xy] (-x-y)(x^2+xy+y^2) 化简x^-y^/x^-2xy+y^ 2*(x-y)²(y-x)(xy) (x+y)/x /(x-(2xy-y^2)/x) 因式分解 因式分解5x^2-15x+2xy-6y 因式分解:5x^2+6y-15x-2xy 因式分解:5X^2 - 15x - 2xy + 6y 代数 x^-y^/ x^-(y-z)^ 除以 x^+2xy+y^/(x-y)^-z^ 乘 x^+xy-xz/x^-xy 化简(3x^2-5xy)+{-x^2-[-3xy+2(x^2-xy)+y^2]} 2x^2-xy-15y^22x^2-5x-12 X-Y/2X+2Y XY/X+Y² 因式分解：x×x-xy-2y×y-x-y x^3-2x^2y+xy^2-x因式分解 (x^2-x-3)(x^2-x-5)-3x^3-2x^2y+xy^2-x (xy-x²)÷(x²-2xy+y²/xy)×（x-y/x²）