Question

FACTORISE : 27 -125a3 - 135a + 225a2

Answer 1

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

27 - 125a3- 135a +225a2

= 3 ^3 - (5a)^3 - 3* 3^2* 5a + 3* 3* (5a)^2

= (3-5a)^3
= (3-5a)(3-5a)(3-5a)

Answer 2

(a-b)³ = a³- b³ - 3a²b² + 3a b²

27 - 125a³- 135a +225a²

= 3³ - (5a)³ - 3* 3² 5a + 3* 3* (5a)²

= (3-5a)³

= (3-5a)(3-5a)(3-5a)