Step-by-step explanation:
[tex] - 3a{(2a - b} ) - 2(2a - b) \\ - 6 {a }^{2} + 3ab - 4a + 2b \\ - 6 {a}^{2} - 4a + 3ab + 2b \\ - 10 {a}^{2} - 3ab + 2b [/tex]
