Question

Find f( - 8) when f(x) = – 2x + 3.fC – 8) = 5f(- 8) = 19f(-8)= - 40f(- 8) = – 40

Answer 1

Given a function f(x) as;

$f(x)=-2x+3$

We can derive the value of f(-8) by subtituting -8 for x in the function f(x);

the x in the function f(x) will be replace by -8.

$\begin{gathered} f(x)=-2x+3 \\ f(-8)=-2(-8)+3 \\ f(-8)=16+3 \\ f(-8)=19 \end{gathered}$

Therefore, f(-8) = 19