Respostas

2014-07-14T09:29:13-03:00
X . x - 14 = 5x
x² - 14 - 5x = 0
x² - 5x - 14 = 0
Δ = (-5)² - 4 . 1 . (-14)
Δ = 25 +56
Δ = 81
√Δ = 9
x = -(-5) + ou - 9 /2
x = 5+ ou - 9 /2
x' = 5 + 9 /2
x' = 14/2
x' = 7
x'' = 5 -9/2
x'' = -4/2
x'' = -2
V = {-2,7}

Abraços.