Question

Раскройте скобки
1) 3/7b(-14t-7/9y+2 1/3c)
2)-1.2xy(5m-6c+1/6t-5/6)
3)0.3mn(1.5-6bc+7b-10c)
(С решением)

Answer 1

3/7 b *( -14t -7/9 y+2 1/3c)= - 6bt - 1/3 by+bc

-1.2xy(5m -6c +1/3 t -5/6)= - 6xym+7.2xyc - 2/5xyt+xy

0.3mn(1.5 -6bc+7b-10c)=4.5mn - 1.8bcmn+2.1bmn - 3cmn