Question

Factorise... check the attached file​

Answer 1

We know that,

a³ + b³ = (a + b)(a² - ab + b²)

So,

a³ + b³ + c(a² - ab + b²)

= (a + b)(a² - ab + b²) + c(a² - ab + b²)

= (a² - ab + b²)(a + b + c)