Variable q4 has an incorrect value.

the original question states assign g(x,y)=xy/x^2+y^2 and calculate fyxx(1.2,3.8) (tripe derivative!) and assign the result to q4

syms x y
g(x,y)=x*y/(x^2=y^2)
q4=subs(diff(diff(g(x,y),y),x),{x,y},{1.2,3.8})

[lateef]

does anyone see whrere i have an incorrect value because i keep getting that error message

Answer 1

[Walter Roberson]

syms x y
g(x,y) = x*y/(x^2+y^2)

g(x, y) = 

dyxx = diff(diff(diff(g(x,y),y),x),x)

dyxx = 

q4 = subs(dyxx,{x,y},{1.2,3.8})

q4 =