16x^2+17|xy|+16y^2=225 图形画出来（是个心）画不出来图形也行

x^+2xy+y^+4=16 x^-2xy+y^=16 求(3xy+6y^)+|x^-(2xy+2y^-3x^)|的值 （12x^2y-8xy^2+16xy）/-3x+2y-4=? (12x^2y-8xy^2+16xy）/-3x+2y-4=? 已知x+y=1,xy=3/16,求x³y-2x²y²+xy³ 已知2x-3根号xy-2y=0(x>0),求x^2+4xy-16y^2/x^2+xy-9y^2 已知x+y=-10,xy=16求x²+y²,(x-y)²,(x+2)(y+2),x²-xy+y².求值！ 已知x^2+xy=16 y^2+xy=9 求(x+y) (x-y)分别是 x+y x-y 不是乘 下列因式分解中,正确的是：.A.-2x^3-3xy^3+xy=-xy(2x^2-2y^2+1).B.-x^2-y^2=-(x+y)(x-y)C.16x^2+4y^2-16xy=4(2x-y)D.x^2)y+2xy+4y=y(x+2)^2 （-3x^y+2xy)-( )=4x^+xy (XY-X^2)除以X-Y/XY=? 合并同类项16x^2y-7(xy^2+xy-x^2+7y^2 已知X+Y=17,XY=42,求X^2y+xy^2的值 x*x+xy=3,xy+y*y=2,则x*x+2xy+y*y=________? 已知xy=-8,xy(x+y)=-16,求x∧2+y∧的值. 因式分解xy(xy+2)+6(xy+8)-4(x+y-2)^2-16(x+y+1)谢谢 因式分解-x^2y+8xy^2-16y^3 X²+2xy+y²/xy乘x²-2xy+y²/xy+y²= [-xy^2(2x+y)-8xy)-x^2y)]除以2xy=计算