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= 3x - 2x - 5 - 6
= x - 11
3. (4a - 2b) (3a + 6b)
= 4a - 3a + 26 + 6b
= a + 8b
= -5a2 - 10a2b - 5a + 6a + 12ab + 6 - a2b - 2a2b2 - ab
= -10a2b - 2a2b - 5a2 - 2a2b2 - 5a + 6a + 12ab +6
= -12a2b - 5a2 - 2a2b2 + a + 12ab + 6
2. (3x + 5) (2x - 6) = (3x + 5) 2x - 6
= 6x2 - 18x + 10x - 30
= 6x2 - 8x - 30
3. (4a - 2b) (3a + 6b) = (4a - 2b) 3a + 6b
= 12a2 + 24ab - 6ab - 12b2
= 12a2 + 18ab - 12b2