Question

помогите, 3 примера, умоляю, срочно, пожалуйста

Answer 1

$- 6c \: (c {}^{2} + 3c) - 3c \: (4c {}^{2} - 3c) = - 6c {}^{3} - 18c {}^{2} - 12c {}^{3} + 9c {}^{2} = - 18c {}^{3} - 9c {}^{2} \\ 0.2c {}^{2} \: (3c {}^{2} + 5d + 5cd {}^{2} ) = 0.6c {}^{4} + c {}^{2}d + c {}^{3} d {}^{2} 4 \\ 0.5cd \: ( - 2c {}^{3} - 4d - 4cd) = - c {}^{4} d - 2cd {}^{2} - 2c {}^{2} d {}^{2}$