compute sum of polynomial square

Can I solve sum of polynomial square in a one variable ?

e.g. (1+x)^2 + (3+x)^2 +2*x =

Can Mathlab compute result as x variable ?

[Sam Chak]

You want to express in this form?

[Walter Roberson]

syms x
eqn = (1+x)^2 + (3+x)^2 +2*x

eqn = 

solx = solve(eqn, x)

solx = 

[RICCARDO]

result shuld be : (1+2x+x^2) + (9+6x +x^2) + 2x

that is finally : 2x^2 + 10x + 10

This is a simple expression expansion

I'd like to plot it too

thanks

Answer 1

[Walter Roberson]

syms x
eqn = (1+x)^2 + (3+x)^2 +2*x

eqn = 

expand(eqn)

ans = 

[RICCARDO]

thanks very very much, can I plot it too?

[Walter Roberson]

fplot