Question

Y ao quadrado + 5y + 4 = 0

Answer 1

Resposta:

$y { }^{2} + 4y + y + 4 = 0 \\ y \times (y + 4) + y + 4 = 0 \\ (y + 4) \times (y + 1) = 0 \\ y + 4 = 0 \\ y + 1 = 0 \\ \\ y1 = - 4 \\ y2 = - 1$