2

f (x) = x + 2 x + 3.

Answer the following three questions about the values f assigns using the instructions above. Do not include an equals sign or the letter f in y

your answers, click the Save Answer button.

1.

What is the value of f (3) ?

Enter Your Unsimplified Answer Here: (3^2) + 2 (3) + 3

Enter Your Simplified Answer Here: 18

What is the value of f (4x) ?

Enter Your Unsimplified Answer Here:

Enter Your Simplified Answer Here:

What is the value of f (x-3) ?

Enter Your Unsimplified Answer Here:

Enter Your Simplified Answer Here:

Question

Liliana Velazquez

Mathematics

8 April, 13:19

2

f (x) = x + 2 x + 3.

Answer the following three questions about the values f assigns using the instructions above. Do not include an equals sign or the letter f in y

your answers, click the Save Answer button.

1.

What is the value of f (3) ?

Enter Your Unsimplified Answer Here: (3^2) + 2 (3) + 3

Enter Your Simplified Answer Here: 18

What is the value of f (4x) ?

Enter Your Unsimplified Answer Here:

Enter Your Simplified Answer Here:

What is the value of f (x-3) ?

Enter Your Unsimplified Answer Here:

Enter Your Simplified Answer Here:

+4

Answers (1)

Know the Answer?

Andrea · Answer 1

f (4x) = (4x) ^2 + 2 (4x) + 3 = 16x^2 + 8x + 3

f (x-3) = (x-3) ^2 + 2 (x-3) + 3 = x^2 - 4x + 6

Step-by-step explanation:

Apparently, you want to evaluate ...

f (4x) f (x-3)

for f (x) = x^2 + 2x + 3.

Put the given argument values in place of the function variable and do the math.

f (4x)

f (4x) = (4x) ^2 + 2 (4x) + 3

= 16x^2 + 8x + 3

__

f (x-3)

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

= x^2 - 6x + 9 + 2x - 6 + 3 = x^2 - 4x + 6