Question

d) x2 + 14x + 51 = 2
Em fórmula de báskara

Answer 1

x² + 14x + 51 = 2

x² + 14x + 51 - 2 = 0

x² + 14x + 49 = 0

∆ = 14² - 4.1.49

∆ = 196 - 196

∆ = 0

x = -14 +- √0/2.1

x= -14 +- 0/2

x1 = -14 + 0/2

x1 = -14/2

x1 = -7

x2 = -14 -0/2

x2 = -14/2

x2 = -7

x1 = x2 = -7