Question

factorise x cube y cube + 27 Z cube​

Answer 1

Step-by-step explanation:

i hope it is helpful to you

Answer 2

To factorise :  x³y³ + 27z³

⇒ (xy)³ + (3z)³

• Identity -  a³ + b³ = (a + b)(a² + b² - ab)

                   Here, a = xy, b = 3z  

⇒ (xy + 3z) [(xy)² + (3z)² - (xy)(3z)]

⇒ (xy + 3z)(x²y² + 9z² - 3xyz)