Question

упростите вырожение -1.6x*(-5y) 2. -7a-b+a+11b 3. a(-8)+(12+a) 4. -3(c-5)+6(c+3)

Answer 1

-1.6x*(-5y)= 8ху
2. -7a-b+a+11b=-6а+10b
3. a(-8)+(12+a)=-8a+12+a= -7a+12
4. -3(c-5)+6(c+3)=-3c+15+6c+18= 3c+33