D = b² - 4acD = (-4)² - 4.2.5D = 16 - 40 = - 24Yv = - D/4aYv = -(-24)/4.2Yv = 24/8 = 3Xv = -b/2aXv = - (-4)/2.2Xv = 4/4 = 1V (1, 3)
D = b² - 4ac
ResponderExcluirD = (-4)² - 4.2.5
D = 16 - 40 = - 24
Yv = - D/4a
Yv = -(-24)/4.2
Yv = 24/8 = 3
Xv = -b/2a
Xv = - (-4)/2.2
Xv = 4/4 = 1
V (1, 3)