Question

resolva as equações em R
3 x2 - 9 x = 0
2 x2 -6 x =0
6 x2 - 4x =0​

Answer 1

Resposta:

3x² - 9x = 0

Δ = 9² - 4*3*0

Δ = 81

x' = (-9 + 9) / 6 = 0

x'' = (-9 - 9) / 6 = 3

2x² - 6x = 0

Δ = 36

x' = (6 + 6) / 4 = 3

x'' = (6 - 6) / 4 = 0

6x² - 4x = 0

Δ = 16

x' = (4 + 4) / 12 = 2/3

x'' = (4 - 4) / 12 = 0