Question

-2a×(-3d)×5/6c помогите 20 баллов даю и ещё 25m×2/5n×(-1/10) и 0.5×(-8a)×3/8a

Answer 1

Ответ:

$-2a*(-3d)*\frac{5}{6}c=6ad*\frac{5}{6}c=\frac{6*5}{6} acd=5acd$

$25m*\frac{2}{5}n*(-\frac{1}{10})=\frac{25*2}{5}mn*(-\frac{1}{10})=10mn *(-\frac{1}{10} )= -(\frac{10*1}{10}mn)= -mn$

$0,5*(-8a)*\frac{3}{8}a= -4a*\frac{3}{8}a= -(\frac{4*3}{8}a^{2})=-\frac{3}{2}a^{2} = -1\frac{1}{2}a^{2} = -1,5a^{2}$