1. √(a+b^2) a=0,4 b=-0,3
√(0,4+(-0,3)^2)=√(0,4+0,09)=√0,49=0,7
2. v=√(3p/d)
v^2=3p/d
3p=v^2d
p=v^2d/3
4. KN^2+NM^2=KM^2
3^2+3^2=KM^2
9+9=KM^2
18=KM^2
KM^2+ML^2=KL^2
18+3^2=KL^2
18+9=KL^2
27=KL^2
KL=√27=3√3
5. а) √(49*0,04)=7*0,2=1,4
б) √32/√8=√4=2
в) 18/(2√12)^2=18/(4*12)=3/(4*2)=3/8
7. a) √50-6√2=5√2-6√2=-√2
б) (4-√6)(√6+4)=16-6=10