Question

if x^2+2= 2^(2/3) + 2^(-2/3) , show that 2x(x^2+3) =3​

Answer 1

Answer:

x^2-2=2^2/3+2^-2/3

x^2=2^2/3+2+2^-2/3

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

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

[x= (2^1/3+ 2^-1/3)]

now use the value x in 2x^3+6x

then it come 5