Question

Calcule o valor de 5x2 + 15x = 0 para que f(x) = 2*

( )30
( )50
( )O
( )10
( )20
( )40​

Answer 1

Resposta: Alternativa (x) 0

5x^2 + 15x = 0

x = -b ± √b^2 - 4 * a * c/2 * a

x = -15 ± √15^2 - 4 * 5 * 0/2 * 5

x = -15 ± √225/10

x = -15 ± 15/10

x1 = -15 + 15/10 = 0/10 = 0

x2 = -15 - 15/10 = -30/10 = -3