Jawapan

2016-05-24T13:24:10+08:00
A)  2x² - 18y² = 2 (x² - 9y²)
                      = 2 (x + 3) (x - 3)

b) 36a² - 16b² = (6a + 4b) (6a -  4b)

c)  x² + 5x + 6 = (x + 3) (x + 2)