7
Step-by-step explanation:
The given algebraic expression is;
![-x^2-6y+13x+7](/tpl/images/0424/3253/8a543.png)
This is an algebraic expression in x and y.
Any term that is independent ย of these two variables is called the constant term.
The term '7' is independent ย of these variables.
Hence the constant term is 7.