Question

What is the value of the expression 7x2+ 9x-3 when x = 3?

Answer 1

87

Step-by-step explanation:

To find the value of the expression at x = 6, we simply replace x with 6. This gives

`7(3)^2+9(3)-3`

which we simplify to get:

`\begin{gathered} 7*9+27+-3 \\ =63+27-3 \\ =\boxed{87.} \end{gathered}`

Hence, the value of the expression is 87 when x = 3.