初二数学题3已知x^+y^+8x+6y+25=0,求(x^
已知x^+y^+8x+6y+25=0,求(x^-4y^)/(x^+4xy+4y^)-x/(x+2y)
已知x^+y^+8x+6y+25=0, (x+4)^+(y+3)^=0, x=-4,y=-3 (x^-4y^)/(x^+4xy+4y^)-x/(x+2y)=-0.12