Respuestas

  • Usuario de Brainly
2012-12-20T00:47:25+01:00

3 x^(1/3) + 2(x)^(2/3) = 5

let x^(1/3) = a, then x^(2/3) = a^2

3a + 2a^2 = 5

2a^2 + 3a - 5 = 0

2a^2 + 5a - 2a - 5 = 0

a(2a + 5) - 1(2a + 5) = 0

(2a + 5)(a - 1) = 0

a = - 5 /2 or 1

so x^(1/3) = -5/2 or 1

x = (-5/2)^3 or 1

x = - 125 /8 and 1