Question

If f(x)= 3x^2+2x-1 find the value of f(-1) you must show all work including all substitutions

Answer 1

Answer:

$f(-1)=0$

Step-by-step explanation:

1. Write the expression of the function.

$f(x)=3x^{2} +2x-1$

2. Substitute the value of x.

$f(-1)=3(-1)^{2} +2(-1)-1$

3. Calculate and simplify.

$f(-1)=3(1) -2-1\\ \\f(-1)=3 -2-1\\ \\f(-1)=0$

4. Express your answer.

$f(-1)=0$

Answer 2

Answer:

f(-1)=0

Step-by-step explanation:

f(-1)=3(-1)^2-2(-1)-1=0