college algebra

Question

Suppose f ( x ) = − x 2 − 7 x − 5 . Compute the following: A.) f ( − 1 ) + f ( 4 ) =

can you please assist me with this problem

Answer 1

HI Juanita,

Your equation is

f ( x ) = − x ² − 7 x − 5 .

Compute the following: A.) f ( − 1 ) + f ( 4 ) =

You would evaluate the function at

f(-1) This means you would substitute -1 in for x

f(-1) = -(-1)² -7(-1) - 5

f(-1) = -1 +7 -5 = 1

Then Evaluate it at x=4

f(4) = -(4)² -7(4) -5

f(4) = -49

Then f(-1) + f(4) = 1 + (-49) = -48

Hope this helps.

Let me know if you need any more help with functions :)