Question

x2 = 5x - 14 = 0 resolva

Answer 1

$x {}^{2} - 5x - 14 = 0$


Δ = b​^2 - 4.a.c
Δ = (-5)^2 - 4.1.(-14)
Δ = 25 + 56
Δ = 81


x = -b +/- √Δ
________
2.a

x = - (-5) +/- √81
____________
2.1


x' = 5 + 9 / 2
x' = 14/2
x' = 7


x'' = 5 - 9 / 2
x'' = - 4 / 2
x'' = - 2