Question

A function is given below. f ( x ) = 3 x 2 − 5 x What is the value of f ( − 4 ) ?

Answer 1

Answer:

$f(-4)=68$

Step-by-step explanation:

We are given the function:

$f(x) = 3x^2 - 5 x$

And we want to find f(-4).

So, we will substitute every x for -4. This yields:

$f(-4)=3(-4)^2-5(-4)$

Evaluate:

$f(-4)=3(16)-(-20)=48+20=68$

So, f(-4) = 68.

Answer 2

Answer:

26

Step-by-step explanation:

(3*2) + (-5*-4)

6 + 20 = 26