Question

factorise
27-125a³-135a+225a²
#answer= (3-5a)​

Answer 1

Step-by-step explanation:

(a)  125a^3 + 27 + 135a + 225a^2       

= 125a^3 + 225a^2 + 135a  + 27      

= (5a)^3 + 3 × (5a)^2 × (3) + 3 × (5a) × (3)^2 + 33       = (5a + 3)^3