Question

Хелп плиз по братски

Answer 1

5. а)
$2(2p + 4c) = \\ 2 \times 2p + 2 \times 4c = \\ 4p + 8c$
б)
$0.5(4 {x}^{2} - 1)(5 {x}^{2} + 2) = \\ (2 {x}^{3} - 0.5x)(5 {x}^{2} + 2) = \\ 10 {x}^{5} + 4 {x}^{3} - 2.5 {x}^{3} - x = \\ 10 {x}^{5} + 1.5 {x}^{3} - x$