Question

4+x(x-4)=x me ajudasse

Answer 1

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


delta = b² - 4.a.c


a= 1
b= -5
c= 4


delta = (-5)² - 4.1.4
delta = 25 - 16
delta = 9


x = -b ± √delta/2.a

x = -(-5) ± √9/2.1

x = 5 ± 3/2

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

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


s={ 1, 4 }




☆Espero ter ajudado!