(12m2 -27) = ?(i) (2m-3)(3m-9)(ii) 3(2m-9)(3m-1)(iii) 3(2m-3)(2m+3)(i

1.	(12m2 -27) = ?(i) (2m-3)(3m-9)(ii) 3(2m-9)(3m-1)(iii) 3(2m-3)(2m+3)(iv) None of these
Answer» (iii) 3(2m-3)(2m+3) By taking 3 as the common factor we get, By using the formula a² – b² = (a – b) (a + b) (12m² -27) = 3(4m² -9) = 3(2m -3) (2m + 3)

(12m2 -27) = ?(i) (2m-3)(3m-9)(ii) 3(2m-9)(3m-1)(iii) 3(2m-3)(2m+3)(iv) None of these

Answer»

(iii) 3(2m-3)(2m+3)

By taking 3 as the common factor we get,

By using the formula a² – b² = (a – b) (a + b)

(12m² -27)

= 3(4m² -9)

= 3(2m -3) (2m + 3)