For this problem, we are given an expression with polynomials, and we need to simplify it.
The expression is:
[tex](7x+4)-(2x+9)[/tex]We need to perform the subtraction between the two:
[tex]\begin{gathered} 7x-2x+4-9\\ \\ 5x-5 \end{gathered}[/tex]The simplified version is 5x-5.