Question

factorise 27 x ki power cube minus y ki power cube​

Answer 1

27x^3-y^3=(3x)^3-y^3

a^3-b^3=(a-b)^3-3a^2b+3ab^2

(3x)^3-y^3=(3x-y)^3-3×9x^2y+3×3xy^2