Question

6. Factorise the following a) x² + 9x + 18 b) 2x² - 7x – 15 c) 2x² - x + d) (a – 3b)³ + (3b – c)³ + (c – a)³ e) x³ - 6x² + 3x + 10 f) 2y³ - 5y² - 19y + 42

Answer 1

a):-

(x+6)(x+3),

b):-

2x²-(10-3)x-15,

2x²-10x+3x-15,

2x(x-5)+3(x-5),

(x-5)(2x+3),