Question

1) SHOW WORK: Evaluate f(-2):

f(x) = 3x -4

2) SHOW WORK: Evaluate f(8):
f(x)=x^2 -4

​

Answer 1

1) f(-2) = -10

2) f(8) = 60

Explanation:

`1)\\f(x)=3x-4\\\\f(-2)\to\text{put x = -2 to the equation of the function}\ f(x):\\\\f(-2)=3(-2)-4=-6-4=-10\\2)\\f(x)=x^2-4\\\\f(8)\to\text{put x = 8 to the equation of the function}\ f(x):\\\\f(8)=8^2-4=64-4=60`

Answer 2

- 10 and 60

Explanation:

1

To evaluate f(- 2) substitute x = - 2 into f(x)

f(- 2) = (3 × - 2) - 4 = - 6 - 4 = - 10

2

To evaluate f(8) substitute x = 8 into f(x)

f(8) = 8² - 4 = 64 - 4 = 60