Question

Which of the following is an x intercept of the function?

Answer 1

Answer:

A) 4

Step-by-step explanation:

The given function is $f(x)=x^3-5x^2-8x+48$

If $f(a)=0$, then $a$ is an x-intercept of $f(x)$

Let us substitute x=4 and simplify:

$f(4)=4^3-5(4)^2-8(4)+48$

$f(4)=64-80-32+48$

This implies that:

$f(4)=-48+48=0$

Therefore 4 is an x-intercept of $f(x)=x^3-5x^2-8x+48$

Also, f(-4)=64, f(2)=20, and f(-2)=36.

This means that, -4, 2, and -2 are not x-intercepts

Answer 2

Answer:

answer is 4 for apex :)

Step-by-step explanation: