Math Question Help :) (1 Viewer)

[MONKEYjulz]

Is my solution correct?

Given P(x) = 4x^3 - 27x + k has a double root. Find possible values for k.

P'(x) = 12x^2 - 27
P'(x) = 0
x^2 = 27/12
x= +/- 3/2
P(3/2) = 27/2 - 81/2 + k = 0
P(-3/2) = -27/2 + 81/2 + k = 0

k = 54/2 = 27
k = -54/2 = -27

Help is appreciated.

 

[Timothy.Siu]

yeah looks fine

 

[MONKEYjulz]

yeah looks fine

Alright. Thanks man