Question

I need to figure out the easiest way to solve this and apply the method to every problem

Answer 1

The function is given as,

`f(x_()=-3x^2-7x)`

It is asked to find the value of the expression,

`f(7)`

This can be obtained by replacing 'x' by 7 in the given expression of the function,

`f(7)=-3(7)^2-7(7)`

Resolve the parenthesis,

`\begin{gathered} f(7)=-3(49)-49 \\ f(7)=-147-49 \end{gathered}`

Simplify the terms further,

`f(7)=-196`

Thus, the value of the expression f(7) is obtained as,

`=-196`