tolong dengan cara ya dan besok harus di kumpulkan

1. 7 x a x 4b x 5a
= 7a x 4b x 5a
= 7a x 5a x 4b
= 35a² x 4b
= 140a²b

2. -6 x (-3q) x 4pq x (-p)
= -6 x (-p) x (-3q) x 4pq
= 6p x (-3p) x 4pq
= -18pq x 4pq
= -72p²q²

4. 8xz x 3y²z x (-4x²y)
= 24xy²z² x (-4x²y)
= -96x³y³z²

5. 2p² x (-5pr) x 3pq² x (-8pr²)
= 2p² x 3pq² x ( -5pr) x ('8pr²)
= 6p³q² x 40p²r³
= 240p pangkat5 q²r³

6. -6mx² x 2xy² x (-4my) x (-5m²xy²)
= -12x²y²m x 20xy³m²
= -240x³y pangkat 5 m³

7. a(3a + 8b)
= 3a² + 8b
= 11a³b

8. 2a(7a² + 4b)
= 14a³ + 8ab
= 22a pangkat 4 b

9. -5p²(6p - 3p)
= -30p³ + 15p²q
= -45p pangkat 5 q