Question

В*в+9=34 ,(у-3) * (4-у)=0 решить уравнение

Answer 1

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