Question

using (a–b)3 = a3 –b3 –3ab(a–b) tick the correct of these when x = p1/3 –using (a–b)3 = a3 –b3 –3ab(a–b) tick the correct of these when x = p1/3 – p–1/3 p–1/3

Answer 1

Answer:

p - 1/p

Step-by-step explanation:

Given  

using (a–b)^3 = a^3 –b^3 –3 ab(a–b) tick the correct of these when x = p^1/3 – p^–1/3  

Given (a – b)^3 = a^3 – b^3 – 3 ab(a – b)

Also given x = p^1/3 – p^-1/3

So x^3 = (p^1/3)^3 – (p^-1/3)^3 – 3.p^1/3.p^-1/3(p^1/3 – p^-1/3)

Now x^3 = p – p^-1 – 3 x

So x^3 + 3 x = p – 1/p

So we get p – 1/p

Answer 2

Answer:

answer will be x^3+3x=p-1/p