Answer:
f(- 4) = 25
Step-by-step explanation:
Note the absolute value function | a | always returns a positive value, that is
| - a | = | a | = a
Given
f(x) = 2 | 5x + 7 | - 1
To evaluate f(- 4) substitute x = - 4 into f(x)
f(- 4 ) = 2 | 5(- 4) + 7 | - 1 = 2 | - 20 + 7 | - 1 = 2 | - 13 | - 1 = (2 × 13) - 1 = 26 - 1 = 25
