Question

dada a funcao f(x)=-x²+9x+18 determine o zeros da função ​

Answer 1

f(x) = 0 => x² + 9x + 18 = 0

(x + 3).(x + 6) = 0

x + 3 = 0 => x' = -3

x + 6 = 0 => x'' = -6

S = {-6, -3}