Question

x ao quadrado +x = -7 equacao de 2 grau

Answer 1

x² + x = -7
x² + x + 7 = 0

delta = 7² - 4 * 1 * 7
delta = 49 - 28
delta = 21

x = - 7 +- √21/ 2

x = -7 +- 4.5/2

x1 = -7 + 4.5/2 -> 3.5/2

x2 = -7-4.5/2