tolong bantuannya yang njawab tolong jelas dan lengkap ya please

1. a(3a+8b) = 3a² + 8ab
2. -5p²(6p-3q) = -30p³ + 15p²q
3. -3b(6a²+5ab-4b²) = -18a²b - 15ab² + 12b³
4. (x+4)(x+15) = x²+15x+4x+60
= x²+19x+60
5. (2y-5)(2y+3) = 4y²+5y-10y-15
= 4y²-5y-15
6.(6x-9y)(6x-9y) = 36x²-54xy-54xy+81y² = 36x²-108xy+81y²
(Maaf ya sampai sini aja udh capek)