Question

x^2/3-3x^1/3-4=0 Solve by making a u substitution.

Answer 1

let u=x^(1/3)
so u^2=x^(2/3)
you have a quadratic equation in terms of x^(1/3)
not in terms of u since you replaced all the x^(1/3) 's with u

Answer 2

okay

Answer 3

u^2-3u-4=0

Answer 4

ok solve for u
factor or use quadratic formula