Write in Quadratic Form

Question

Write the expression 2n^2/3 - 3n^1/3 +5 in quadratic form, if possible.

 

A.(2n^1-3)^2 3(n^1/3) + 5 

B.2 (n^1/3)^2 - 3 (n^1/3) + 5

C.2 (n^2)^1/3 - 3 (n)^1/3 + 5 

D. not possible 

Answer 1

B is the best answer.

 

NB; in case you are solving a quadratic equation like this, assuming the expression above is equal to some constant like zero, one method would be:

 

Let n^1/3 be equal to x (meaning n = x^3)

 

Rewriting the same we get; 2x^2 -3x +5 = (whatever the constant is)

 

Then cube the values you obtain for x to obtain the values for n.