Question

Resolva a equação x²-x-6=0. PFV E OBRIGADO

Answer 1

x²-x-6=0

a= 1
b= -1
c = -6

Δ = b² -4 .a .c
Δ = (-1)² -4 . 1. -6
Δ = 1 + 24
Δ = 25

-b +- √Δ    /2.a
-(-1) +- √25     /2.1
1 +- 5   / 2

x' = 1 + 5   /2
x' = 6 / 2
x' = 3

x" = 1 - 5   /2
x" = -4 /2
x" = -2

Resposta:  S:{ 3 e -2 }