Question

Let f(x) = x2 - 8x 5. Find f(-1).

Answer 1

In the equation you have to replace all x's with -1

f (-1) = (-1)^2 - 8(-1) +5
f (-1) =  1 + 8 + 5
f (-1) = 14

the f(-1) stand for the function of -1. it is also equivalent to y

Answer 2

Answer:

f(-1)=14

Step-by-step explanation:

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

To find : The value of f(-1)

Solution : Follow the steps :

Step 1- Write the function

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

Step 2- Put x=-1 to find the value of f(-1)

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

Step 3- Solve the above equation

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

$f(-1)=14$

Therefore, f(-1)=14