Given f, of, x, equals, minus, 5, x, plus, 2f(x)=−5x+2, find f, of, minus, 4f(−4).

1 answer

To find \( f(-4) \) using the function \( f(x) = -5x + 2 \), we can substitute \( -4 \) into the function:

\[ f(-4) = -5(-4) + 2 \]

Now, calculate \( -5(-4) \):

\[ -5(-4) = 20 \]

Next, add 2:

\[ f(-4) = 20 + 2 = 22 \]

Thus, we have:

\[ f(-4) = 22 \]

So, the final result is:

\[ f(-4) = 22 \]