Question

Find f(a-3) when f(×) = -2×-5

Answer 1

`f(a-3)=-2a+1`

Explanation: We are given f(x) and we need to find the f(a-3):

`f(x)=-2x-5`

Therefore f(a-3) would be:

`\begin{gathered} f(x)=-2x-5 \\ \therefore\rightarrow \\ f(a-3)=-2(a-3)-5=-2a+6-5=-2a+1 \\ \therefore\rightarrow \\ f(a-3)=-2a+1 \end{gathered}`

Note! We simply evaluated f(x) for x = a-3