1) find the first order partial derivative fx(x,y)2) find the first order for fy(x,y)3) x=4) y=5) the critical value is ?

Let f (x, y) = x2 + xy + 2y - 7x. We need to find the critical values. Question 1 First, let's find the first-order-partial derivative fx (x, y) Enter the coefficients for fr (x, y): fz (x, y) = X +