Question

X elevado a dois +5x-14=0

Answer 1

x² + 5x - 14= 0

Coeficientes: a= 1, b= 5, c= -14.

Δ= b² - 4.a.c

Δ= 5² - 4.1.(-14)

Δ= 25 + 56

Δ= 81

x = - b ± √Δ ÷

           2·a

x =  -5 ± √81÷

           2.1

x =  -5 ± 9 ÷

           2

x'= 2

x"= -7