Respostas

2013-11-14T18:52:51-02:00
Q² - 50q = 30 000
q² - 50q - 30 000 = 0

Δ = b² - 4 ac
Δ = (-50)² - 4.1.(-30 000)
Δ = 2 500 + 120 000
Δ = 122 500

x= -b ± √Δ / 2a
x= -(-50) ± √122 500 / 2.1
x= 50 ± 350/ 2

x' = 50 + 350/2 = 400/2 = 200
x'' = 50 - 350/2 = -300/2 = -150 ----> nao serve