若xy是實數,且m=3x^2+2y^2-2xy-4x-2y-3,確定m的最小值!

若xy是實數,且m=3x^2+2y^2-2xy-4x-2y-3,確定m的最小值!

m=x^2+y^2-2xy+2x^2-4x+2+Y^2-2y+1-6=(x-y)^2+2(x-1)^2+(y-1)^2-6>=-6
答案為-6