Question

Д3.4 д3.5
.................

Answer 1

3.4

(a+6b)/(a+b) = (a/b + 6b/b)/(a/b + b/b) = (a/b + 6)/(a/b + 1) = (4+6)/(4+1)=10/5=2

3.5

√(101^2-20^2)=√(101+20)(101-20) = √121*81 = 11*9=99