Question

resolva a) 4x² – 50 x – 90 = 0

Answer 1

Explicação passo-a-passo:

4x² - 50x - 90 = 0

a= 4; b = -50; c = -90

D = -50² - 4 . 4 . (-90)

D = 2500 - 1440

D = 3940

x' = (-(-50) + V3940)/(2 . 4)

x' = (50 + V3940)/(8)

x' = (50 + 2V985)/8

x' = (25 + V985)/4

x" = (-(-50) - V3940)/(2 . 4)

x" =( 50 - V3940)/( 8)

x'' = (50 - 2V985)/8

x'' = (25 - V985)/4