6\% от 100 = 100*6/100 = 6
1) (b^2+9 = 34 2) (y-3)(4-y) = 0 b^2 = 34-9 у-3 = 0 4-у = 0
b^2 = 25 у = 3 у = 4
b = 5
b = -5