Hello!
To find the value of f(-1), you need to substitute -1 into each x variable and solve. Remember to use PEMDAS when simplifying.
f(x) = x² - 8x + 5 (substitute -1 for x)
f(-1) = (-1)² - 8(-1) + 5 (simplify the exponent)
f(-1) = 1 - 8(-1) + 5 (multiply)
f(-1) = 1 + 8 + 5 (add alike terms)
f(-1) = 14
Therefore, the value of f(-1) is 14.
