Simplify each of the following : (i) ( x +3) 3 + ( x -3) 3 (ii) (iii) (iv) (2 x -5 y ) 3 - (2 x +5 y ) 3

Question

Philoid · Accepted Answer

(i) Using the identity,

(ii) Using the identity, a³ - b³ = (a-b)(a² +ab + b²)

(iii) Using the identity, a³ + b³ = (a+b)(a² - ab + b²)

(iv) Using the identity, a³ - b³ = (a-b)(a² + ab + b²)