Given
we are given an expression
[tex]7a-4(2a-4)[/tex]Required
we need to write the above expression in simplest form.
Explanation
We know that
[tex]a\times(b-c)=a\times b-a\times c[/tex]Now the given expression is
[tex]\begin{gathered} 7a-4(2a-4)=7a-4\times(2a-4)=7a-(4\times2a)-(4\times(-4)) \\ =7a-8a-(-16)=-a+16\text{ } \\ \text{ } \end{gathered}[/tex]So option a is correct.
