Odpowiedzi

2010-03-02T12:17:52+01:00
2a² = a + 3
2a² - a - 3 = 0

Δ=1-4*2*(-3) = 25

a₁= (1-5)/4 = -1
a₂= (1+5)/4 = 1½
  • Roma
  • Community Manager
2010-03-02T13:14:11+01:00
2a² = a + 3
2a² - a - 3 = 0
Δ = 1 + 24 = 25
√Δ = √25 = 5
a₁ = 1 - 5 / 4 = - 4 / 4 = - 1
a₂ = 1 + 5 / 4 = 6 / 4 = 1²/₄ = 1½