Question

Раскройте скобки:
1.-(b+c)-(4c-b+a)+(2a+5c)
2.4a(3-6c+b)
3.-1,2(b+5c)-0,5(12b-4c)

Answer 1

1)-b-c-4c+b-a+2a+5c=a;
2)12a-24ac+4ab
3)-1,2b-6c-6b+2c=-7,2b-4c