how do I properly format using the syms function in matlab

I am new to matlab and after reading the tutorials for factoring, solving and simplifying algebraic operations, I'm still not getting it. I beleive I have a formatting issue. Do I need to put parenthisis around the x's?

syms x

c=factor(2*x^4+x^3-19*x^2-9*x+9);

fprintf('Problem 3a answer is :',c)

syms x

d =solve (2*x^4+x^3-19*x^2-9*x+9==0,x);

fprintf('Problem 3b answer is :',d)

syms x

e =simplify 3*(x-2y+4(3x+7y-81));

fprintf('Problem 3b answer is:', e)

[John]

Thanks, I used fprint on previous problems but I realize that was when I needed to approximate to 6 decimal places. Using disp, the answers popped write up!

Answer 1

[John D'Errico]

Do you need parens around the x? NO.

syms x
c=factor(2*x^4+x^3-19*x^2-9*x+9);
fprintf('Problem 3a answer is :',c)

Problem 3a answer is :

Anyway, why do you think you need to use fprintf here? And even if you did use fprintf, that tool needs a format spec. You might do this:

disp('Problem 3a answer is :'),disp(c)

Problem 3a answer is :

Or, perhaps this:

disp(['Problem 3a answer is : ',char(c)])

Problem 3a answer is : [x - 3, 2*x - 1, x + 3, x + 1]

[John]

Thanks, I used fprint on previous problems but I realize that was when I needed to approximate to 6 decimal places. Using disp, the answers popped write up!