How to add two functions and display the sum?

I am trying to add two functions together and display the addition as a new function.

f=@(x) x^2+x;
g=@(x) 3*x^2+5*x;
z=f(x)+g(x);

I want to print z as:

@(x) 4*x^2+6*x

How do I achieve this? The disp function only gives the output of z as @(x) f(x)+g(x)

[Dyuman Joshi]

function handles don't resolve the expression per say, for example -

a = 1.3;
b = .2;
c = 30;
parabola = @(x) a*x.^2 + b*x + c

parabola = function_handle with value:
    @(x)a*x.^2+b*x+c

This is not displayed as

par = @(x) 1.3*x.^2 + 0.2*x + 30

par = function_handle with value:
    @(x)1.3*x.^2+0.2*x+30

Your closest option I think is syms

syms f(x) g(x)
f(x)=x^2+x;
g(x)=3*x^2+5*x;
%symbolic function
z(x)=f(x)+g(x)

z(x) = 

%Converting the symbolic function into function handle
z=matlabFunction(z)

z = function_handle with value:
    @(x)x.*6.0+x.^2.*4.0

Answer 1

[Sarvesh Kale]

Hi Saumya,

You can try the symbolic math to solve your issue

syms x 
f = x*x + x ;
g = 3*x*x + 5*x ;
z = f + g 

z = 

x = 3;
subs(f) % will give you f(3)

ans = 

12

subs(z) % will give you f(3) + g(3)

ans = 

54

You can refer the documentation of symbolic math library for symbolic functions

https://in.mathworks.com/help/symbolic/create-symbolic-functions.html?s_tid=srchtitle_symbolic%20_9