(25^2/12^2)-[(y-55)^2/b^2]=1(13^2/12^2)-(y^2/b^2)=1

(12-2x)/X=(-16-2Y)/Y X^2+Y^2=25 Y 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) (5-2y)(4y的二次+25+10y) (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 2y^2-10.5y+12 化简 y^2-9y+25>0 (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 y²+y-2 计算.25(x+y)^2-0.81(x-y)^20.25(x+y)^2-0.81(x-y)^2 . 25(x-y)*2+10(y-x)+125（x-y)^2+10(y-x)+1