FACTORISE : 27 -125a3 - 135a + 225a2
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Answered by
117
(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)
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)
Answered by
84
(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)
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