Question

Помогите решить 403 и 404

Answer 1

1) 157(37+29)+143(42+24)= 157*66+143*66=66(157+143)=66*300= 19800
2) 5 1/2(9 2/3+10 1/3)-16(4,5+1)= 11/2*60/3-16*5,5= 5,5(20-16)= 5,5*4=22

1) 5m(m-n)-7(m-n)= (m-n)(5m-7)= (1,4+5,17)(5*1,4-7)= 6,57*0= 0
2) a(3a²+b)-2b²(b+3a²)= (3a²+b)(a-2b²)= (3*1/9+2/3)(1/3-2*4/9)= (1/3+2/3)(1/3-8/9)=1*(3/9-8/9)= -5/9