Respostas

2014-07-23T15:32:22-03:00
Olá, Valcrismenezes!

9x² -16 = 0
a = 9
b = 0
c = -16

Δ = b² - 4.a.c
Δ = 0² - 4.9.(-16)
Δ = 0 + 576
Δ = 576

-b +- √Δ / 2.a
-0 +- √576 / 2.9
-0 +- 24 / 18

x' = -0+24/18 = 24/18 = 24:3/18:3 = 8:2/6:2 = 4/3
x'' = -0-24/18 = -24/18 = -24:3/18:3 = -8:2/6:2 = -4/3
  • Usuário do Brainly
2014-07-23T19:36:26-03:00
9x² - 16 = 0
9x² = 16
x² = 16/9
x = 
1 1 1