1. 6(3a + 2) 2. (x + 5) (x - 4) 3. 2x (y + 8) 4. (y - 9) (y - 3) 5. (2x - 1) (x + 2y - 3) Tolong jawab yah! Pliss

1. 6(3a + 2)
= 18a + 12
2. (x + 5) (x - 4)
= x² - 4x + 5x - 20
= x² + x - 20
3. 2x (y + 8)
= 2xy + 16x
4. (y - 9) (y + 8)
= y² - 3y - 9y + 27
= y² - 12y + 27
5. (2x - 1) (x + 2y - 3)
= 2x² + 4xy - 6x - x - 2y + 3
= 2x² + 4xy - 7x - 2y + 3
= 2x² - 7x + 4xy - 2y + 3