13x²+5y²+8xy-44x-6y+41=0 求(x+y)的2017次方的值13x²+5y²+8xy-44x-6y+41=0则2(x+2y)²-3(y+1)²+11(x-2)²=02(x+2y)²+11(x-2)²=3(y+1)²分别令x+2y=0，x-2=0，y-1=0则x=2, y=-1(x+y)的2017次方=（2-1）的2017次方=1
