Question

Let f(x) = x2 − 8x + 5. Find f(−1)

Answer 1

$f(x) = x^2- 8x + 5$

$f(-1) = (-1)^2- 8(-1) + 5$

$f(-1) = 1 + 8 + 5$

$f(-1) = 9 + 5$

$f(-1) = 14$

Answer 2

 f(x) = x² - 8x + 5
f(-1) = (-1)² - 8(-1) + 5
f(-1) = 1 + 8 + 5
f(-1) = 9 + 5
f(-1) = 14