Question

PLEASE HELP ITS AN EMERGENCYYYYYYYYYY!!!

Given f(x) = 3x^3 - 4x + k, and x – 1 is a factor of f(x), then
what is the value of k?

Answer 1

The value of k is 1.

Explanation:

x – 1 is a factor of f(x)

This means that:

x - 1 = 0

x = 1

That means that when
`x = 1, y = 0`. We use this to find the value of k.

f(x) = 3x^3 - 4x + k

`3*1^3 - 4(1) + k = 0`

`3 - 4 + k = 0`

`k = 1`

The value of k is 1.