Find the critical point(s) of f(x,y)=x2+xy+y2−3xf(x, y) = x^2 + xy + y^2 - 3xf(x,y)=x2+xy+y2−3x.
(2,−1)(2, -1)(2,−1)
(1,−1)(1, -1)(1,−1)
(2,0)(2, 0)(2,0)
(0,0)(0, 0)(0,0)