Question

Given f(x)=5x-1 What is f(-2)​

Answer 1

Answer:

f(2) means multiply it by 5 and then subtract 1.

--> f(x) =5x-1

--> f(-2) = 5(-2)-1

--> f(2-) = -10-1

--> f(-2) = -11  

Step-by-step explanation:

Answer 2

Answer:

-11

Step-by-step explanation:

Start off with the meaning of f(x) = 5x - 1

The notation is used to tell us that when a number is put in for the x on the left, it is put in every x on the right as well. The left x comes first then what to do with it on the right gives the answer. So watch it happen.

f(-2) means that wherever you see an x on the right, put in -2 for it.

f(-2) = 5*-2 - 1

f(-2) = -10 - 1

f(-2) = - 11

No matter how complicated what is on the right, the rule is the same.

f(x) = x^5 - 4x^3 - x

f(-2) = (-2)^5  - 4*(-2)^3 - 2   would be how you interpret that question.

f(-2) = -32  + 32 - 2

f(-2) = -2