Question

Помогите пожалуйста!!!
(m²-mn+n²) (a-b) ;
(d²+6dp-2p²) (p-d) ;
(y²+5y+2)(y-6)​

Answer 1

am^2-bm^2-amn+an^3-bn^2

Answer 2

$(m {}^{2} - mn + n {}^{2} ) \times (a - b) = \\ = am {}^{2} - bm {}^{2} - amn - mn \times ( - b) + an {}^{2} - bn = \\ = am {}^{2} - bm {}^{2} - amn + bmn + an {}^{2} - bn {}^{2} \\ \\ \\ 2)(d {}^{2} + 6dp - 2p {}^{2} ) \times (p - d) = \\ = d {}^{2} p - d {}^{3} + 6dp {}^{2} - 6d {}^{2} p - 2p {}^{3} + 2dp {}^{2} = \\ = - 5d {}^{2} p - d {}^{3} + 8dp {}^{2} - 2p {}^{3} \\ \\ \\ 3)(y {}^{2} + 5y + 2) \times (y - 6) = \\ = y {}^{3} - 6y {}^{2} + 5y - 30y + 2y - 12 = \\ = y {}^{3} - y {}^{2} - 28y - 12$

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