Question

resolva usando formula de bhaskara: x^{2} -5x-6=0

Answer 1

x² -5x - 6 = 0

a = 1
b = -5
c = -6

Δ = b ² -4 .a .c 

Δ = (-5)² -4 . 1 . (-6)
Δ = 25 + 24
Δ = 49

-b +- √Δ   / 2 .a

- (-5) +- √ 49   /2 . 1
5 +- 7  /2

x' = 5 + 7   /2
x' = 12 / 2
x' = 6

x"= 5 - 7   /2
x" = -2  /2
x" = -1

Resposta : S{ 6 e -1}