Saved Bookmarks
| 1. |
Factorise 27 x ki power cube minus y ki power cube |
|
Answer» 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
|
|