Please help with the 2nd question. I keep getting the wrong answer and I'm trying to figure out what I'm doing wrong. Please include steps. Thank you so much.

Consider the function f(x, y) - 3x2 - 4y2. Find the the directional derivative of f at the point (-2, -3) in the direction given by the angle 0 = - 2 TT . 24 Find the vector which describes the direction in which f is increasing most rapidly at (-2, -3)