Question

Resolva a equação  

$| x^2- 5x|= 6$

Answer 1

x² -  5x = 6
x² - 5x - 6 = 0

Δ=-(b)²-4.a.c
Δ=-(-5)²-4.1.(-6)
Δ= 25+24
Δ=49

x=(-b+/-√Δ)/2.a
x=-(-5)+/-7)/2

x'=(5+7)/2
x'=12/2
x'=6

x''= 5-7/2
x''= -2/2
x''= -1

S={6, -1}