Question

 15x²-22x+8=0? resposta

Answer 1

15x² - 22x + 8 = 0


delta = (-22)² - 4.15.8
delta = 484 - 480
delta = 4

x = 22 ± √4/2.15

x = 22 ± 2/30

x = 22 + 2/30 = 24/30 = 4/5

x = 22 - 2/30 = 20/30 = 2/3


s={ 4/5, 2/3 }