Question

błagam dla najszybszego daje naj (r-2)^2 +3^2=r^2

Answer 1

(r-2)^2 +3^2=r^2

r^2 - 4r + 4 + 9 = r^2

-4r + 13 = 0

-4r = -13

r = 13/4

r = 3 i 1/4