Question

If a= 2¹/³ - 2-¹/³ then prove that 2a³ +6a =3plz.. answer me quickly​

Answer 1

Step-by-step explanation:

a^3 = {2^(1/3) - 2^(-1/3)}^3

using formula ( a-b)^3

= 2 - 1/2 - 3(2^(1/3) - 2^(-1/3))

a^3 = 2 - 1/2 - 3a

2a^3 = 3 - 6a

2a^3 + 6a = 3. ......... hence proved