Question

If x is 3 what is there value of 4x^2 - 5

Answer 1

`\begin{gathered} \text{Given} \\ 4x^2-5 \\ \end{gathered}`

To evaluate the given at x = 3, substitute x by 3, and evaluate the expression accordingly

`\begin{gathered} 4x^2-5 \\ =4(3)^2-5 \\ =4(9)-5 \\ =36-5 \\ =31 \end{gathered}`

Therefore, the value of the given at x = 3, is 31.