To solve the given problem, we have to evaluate the expression
[tex]n^2\times7-3[/tex]
at n=3.
First, we compute the square of 3:
[tex]\begin{gathered} 3^2\times7-3, \\ 9\times7-3. \end{gathered}[/tex]
Now, multiplying by 7, we get:
[tex]63-3.[/tex]
Finally, subtracting 3, we get:
[tex]60.[/tex]
Answer:
[tex]60.[/tex]
