Question

Suppose _ . Compute the following:

Answer 1

Step-by-step explanation:

f(x) = x² - 5x - 9

To solve both expressions first find f( -4) and f(5)

For f(- 4)

Substitute the value of x that's - 4 into the expression

That's

f(-4) = (-4)² - 5(-4) - 9

= 16 + 20 - 9

= 36 - 9

f(-4) = 27

For f(-5)

Substitute 5 into f (x)

That's

f(5) = 5² - 5(5) - 9

= 25 - 25 - 9

f(5) = - 9

A).

f(-4) + f(5) = 27 - 9 = 18

B).

f(-4) - f(5) = 27 -- 9 = 27 + 9 = 36

Hope this helps you