Question

Função quadrática f (x) = x² - 8x + 12 ?? me ajudem

Answer 1

$delta = ( - {8}^{2} ) - 4 \times 1 \times 12 \\ delta = 64 - 48 \\ delta = 16 \\ x = \frac{ - ( - 8) + 4}{2 \times 1} = \frac{12}{2} = 6 \\ x = \frac{ - ( - 8) - 4}{2 \times 1} = \frac{4}{2} = 2 \\ \\ x = 6 \\ x = 2$