Question

dada a função y=x2+2x-3

Answer 1

delta = 2² +12
delta = 4 +12
delta = 16
x = -2+-raiz de 16/2
x = -2+-4/2
x´=-2+4/2 = 2/2 = 1
x´´ = -2-4/2 = -6/2 = -3