1. -5
2.35-20•35/100=35-7=28
3.26
4.180grade-65grade = 115 grade
5.3
6.30min
Sb2. a=2,-2,14,-14
2. a(2b+1)=14=>. b=3,-4,0,-1
(a,b)=(2,3),(-2,-4),(14,0),(-14,-1)
3. 8•8=64