Saya ada 4 pertanyaan aljabar (1) (-3x+2)(x-5)

1. -3x²+15x+2x-10 = -3x²+17x-10
2. 4m-32+2m²-16m = 2m²-12m-32
3. 10x²-6x-25x+15 = 10x²-31x+15
4. (x²-2y)(x²+2y) = x^4 – 4y²

(-3x+2)(x-5) = -1x+5
(4+2m)(m-8) = 2m²-10m-32
(2x-5)(5x-3) = 10x²-31x+15
(x²-2y)(x²+2y) =x²-4y²
Maaf jika ada yang salah
Somoga membantu ^_^