Question

y=-x² +6x-9 descubra a raiz

Answer 1

delta = 36 - 36
delta = 0
x = -6 +-raiz de 0 /-2
x = -6 +-0/-2
x´=-6+0/-2 = -6/-2 = 3
x´´=-6-0/-2 = -6/-2 = 3