How to find f ( - 3 ) given f ( x ) = 2 x + 2 ?

Question

How to find             f              (        -        3        )             given             f              (        x        )              =    2    x    +    2  ?

repicotit48p · Accepted Answer

Given solution: Simply substitute the value of

- 3

given. In other words,

f (- 3)

is the function of

f (x)

, however in this case,

x

is

- 3

f (- 3) = 2 (- 3) + 2

Distribute

2

through the parenthesis

f (- 3) = - 6 + 2

Simplify

f (- 3) = - 4

Dillan Perez · Accepted Answer

We could replace       -    3   for       x   and simplify:            f              (        x        )              =    2    x    +    2              f              (        -        3        )              =    2          (      -      3      )        +    2              f              (        -        3        )              =    -    6    +    2              f              (        -        3        )              =    -    4  So             f              (        -        3        )              =    -    4  .

How to find f ( - 3 ) given f ( x ) = 2...

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