Evaluate $f (- 1)$ when $f (x) = (x + 7) (x - 5)$
When $f (x) = (x + 7) (x - 5), f (- 1) =$

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Answer

Final Answer: $- 36$

Steps

Step 1 ：Given the function $f (x) = (x + 7) (x - 5)$ , we are asked to evaluate $f (- 1)$ .

Step 2 ：To find the value of $f (- 1)$ , we substitute $x$ with $- 1$ in the function.

Step 3 ：So, $f (- 1) = (- 1 + 7) * (- 1 - 5)$

Step 4 ：Solving this, we get $f (- 1) = - 36$

Step 5 ：Final Answer: $- 36$