2y^2-10.5y+12

2y^2-10.5y+12 因式分解 (y^2+y)^2-8(y^2+y)+12 因式分解(x+y)^2y^2-12(x+y)y^2+36y^2-y^4 数学题=y(y+3)-4(y+3)2=(y+3)(y-4y-12) y²+y-2 (X,Y) f(x,y)={12y^2,0 12y(x-y)^2-8(x-y)^3=? 3x+y=2 -y/x+y=123x+y=2 （-y/x）+y=12 (x-y)^2+12(x-y)+36 9(x-y)-12(y-x)^2 y^2-7y+12因式分解 因式分解y^2一7y+12 7+8y-12y^2 因式分解 y (3y^2+8y-3)-6y(3y+2y-1)+9y x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2 yy''-(y')^2=y^2y' yy''-(y')^2=y^2y' y+y'-2y=2x