Question

Resolva as equações do 2° grau : a)5x²-3125=0 b)9x²-3x =0

Answer 1

a)

∆ = 0² - 4 5 -3125

∆ = 62500

- 0 ± √250 / 2.5

x' = 250/10 = 25

x" = -250/10 = -25

b)

∆ = -3² - 4 9 0

∆ = 9

- (-3) ± √9 / 2.9

3 ± 3 / 18

x' = 6/18

x" = 0