Given: The expression below:
[tex]a^2+5a-8[/tex]To Determine: The value of the expression when
[tex]a=4[/tex]To achieve this, substitute a= 4 into the expression as shown below:
[tex]\begin{gathered} a^2+5a-8 \\ 4^2+5(4)-8 \\ 16+20-8 \\ 36-8 \\ 28 \end{gathered}[/tex]Hence, the value of the given expression is 28
