Question

Resultado de -2x²+10x=0

Answer 1

Δ = (10)² - 4.(-2).0
Δ = 100 
x = -10 +- √100/2.(-2)
x = - 10 +- 10/ -4
x' = -10 - 10 / -4 
x' = -20 / -4 = 5 resposta
x" = -10 +10 / -4
x" = 0 / -4 = 0 resposta

Answer 2

- 2x² + 10x = 0
x.(-2x + 10) = 0
x = 0

- 2x + 10 = 0
- 2x = - 10 (-1)
2x = 10
x = 10/2
x = 5

R.: x = 0 e x = 5