Question

Factorise: a^3 + 216b^3

Answer 1

Answer:

a^3+216b^3

=(a)^3+(6b)^3

=(a+6b){(a)^2-a.6b+(6b)^2}

=(a+6b)(a^2-6ab+36b^2)

Answer 2

Answer:

a^3 – 216b^3 = (a – 6b) (a^2 + 6ab + 36b^2 ).