tolong dong ini semuanya,kurang ngerti saya. terimakasih

1) - 5(x³ - x² + 5x)
= - 5x³ + 5x² - 25x

2) 4(ax² + 11x - 2)
= 4ax² + 44x - 8

3) 15p (-3qp + pq²)
= - 45p²q + 15pq²

5) (3a + 2b)(3a - 2b)
= 9a² + 6ab - 6ab - 4b²
= 9a² - 4b²

6) (6a + 4)(a + 2)
= 6a² + 4a + 12a + 8
= 6a² + 16a + 8

7) (4a + 6b)(2p + 3)
= 8ap + 12bp + 12a + 18b

8) (2p + 2)²
= 4p² + 8p + 4

9) (4a - 2b)²
= 16a² - 16ab + 4b²

5.)(3a+2b)(3a-2b)=3a.3a 3a.-2b +2b.3a +2b.-2b
=9a²-6ab+6ba-4b²
=9a²+36ab-4b²