EXERCISE 7C Factorise: FORMULA: (i) a 2  + 2ab + b 2  = (a + b) 2 (ii) a 2  – 2ab + b 2  = (a – b) 2 (1) x 2  + 8x + 16 = (x) 2  + (2 × x × 4) + (4) 2 = (x +… Read more »

EXERCISE 7B Factorise: FORMULA: (a 2  – b 2 ) = (a + b) (a – b) (1) x 2  – 36 = x 2  – 6 2 = (x – 6) (x + 6) (2) 4a 2  – 9 = (2a) 2  – (3) 2 = (2a – 3) (2a +… Read more »

EXERCISE 7A Factorise: (1) (i) 12x + 15 = [(3×4) x] + (3 × 5) = 3(4x + 5) (ii) 14m – 21 = 7 (2m – 3) (iii) 9n – 12n 2 = 3n (3 – 4n) (2) (i) 16a 2  – 24ab = 8… Read more »

EXERCISE 6E OBJECTIVE QUESTIONS Tick (√) the correct answer in each of the following: (1) The sum of (6a + 4b – c + 3), (2b – 3c + 4), (11b – 7a + 2c – 1) an… Read more »