12m2 – 27 = 3(4m2 – 9) (taking 3 as common from whole)= 3(2m – 3)(2m + 3) a2 – b2 = (a – b)(a + b)

Q10 of 137 Page 103

12m² – 27 =?

12m² – 27 = 3(4m² – 9) (taking 3 as common from whole)

= 3(2m – 3)(2m + 3) a² – b² = (a – b)(a + b)

ab – a – b + 1= ?

x² – xz + xy – yz=?

x³ – x =?

1 – 2ab – (a² + b²) =?

12m2 – 27 =?