Question

resolva as seguintes equações do 2° Grau/5×2-3×-2=0​

Answer 1

Olá Aline!

5x² - 3x - 2 = 0

A= 5

B= - 3

C= - 2

∆= b² - 4ac

∆= ( - 3)² - 4 • 5 • ( - 2)

∆= 9 + 40

∆= 49

x= - b ± √∆ / 2a

x= - ( - 3) ± √49 / 2 • 5

x'= 3 + 7/10 = 10/10 = 1

x''= 3 - 7/10 = - 4/10 = - 2/5

S= ( -2/5 , 1)