Use the substitution
u=x(1/3)
The original equation
3x^(1/3) + 2x^(2/3) = 5
now becomes
3u + 2u² = 5
Solve by the quadratic formula for u, and finally replace u by x(1/3).
3x^(1/3) + 2x^(2/3) = 5
solve for x
3 answers
Sorry, (1/3) should read (1/3)
I'll try it again:
x(1/3) should read x(1/3)
x(1/3) should read x(1/3)