Question

Resolva a equaçao x²+5x=0?

Answer 1

X² + 5x = 0

X x (x + 5) = 0


X = 0
X + 5 = 0


X =0
X = -5

Answer 2

X² +5x=0
Delta= b² + 4.a.c
D=5² + 4.1.0
D= 25 + 0= 25
X=-b + ou -  raiz de D/2a
X'= -5 - 5/2=-10/2= -5
X²= -5 +5/2=0/2