Question

4x+x(x-4)=x me respondem por favor , urgentee

Answer 1

4x + x(x - 4) = x
4x + x² - 4x = x
x² - x = 0
x(x - 1) = 0
x = 0

OU

x - 1 = 0
x = 1

Answer 2

4 + x² - 4x = x
4 + x² -4x -x = 0
x² -5x +4 = 0

∆ = b² - 4•a•c
∆ = (-5)² - 4•1•4
∆= 25 - 16
∆ = 9 existe duas raizes REAIS

x= -b+/- √∆ /2•a
x=-(-5) +/- √9 /2•1
x=5 +/- 3/2

x'=5+3/2=8/2=4

x"=5-3/2=2/2=1


S={4,1}