If f(x,y)=64−8x2−y2, find fx​(2,−9) and f(2,−9) and interpret these numbers as slopes. fx​(2,−9)= fy​(2,−9)= SBIOCALC1 7.4.003.MI. Solve the differential equation. (x2+1)y′=xy Evaluate the integral by making the given substitution. (Use for the constant of integration.) ∫e−4xdx,u=−4x in (smaller value) m (targer value)