Saved Bookmarks
| 1. |
10. Factorise each of the following:(i) 27y³ + 125z³ |
|
Answer» Answer: 27y³+125z³ = (3y + 5z) ( 9y² + 25z² - 15YZ) 64m³-343n³ = (4m - 7N) ( 16m² + 49n² + 28mn) Step-by-step explanation: 27y³+125z³ = (3y)³ + (5z)³ using a³ + b³ = (a + B) (a² + b² - ab) here a = 3y & b = 5z = (3y + 5z) ( (3y)² + (5z)² - (3y)(5z)) = (3y + 5z) ( 9y² + 25z² - 15yz)
|
|