Answer:
87
Explanation:
To find the value of the expression at x = 6, we simply replace x with 6. This gives
[tex]7(3)^2+9(3)-3[/tex]
which we simplify to get:
[tex]\begin{gathered} 7\times9+27+-3 \\ =63+27-3 \\ =\boxed{87.} \end{gathered}[/tex]
Hence, the value of the expression is 87 when x = 3.
