Question

x elevado a 2 - x -6 =0

Answer 1

bom usando o delta .

x² - x - 6 = 0

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

x = 1 ± 5 / 2
x' = 6 / 2 = 3
x" = -4 / 2 = -2

S={ 3 , -2 }