Question

dada a equaçao do 2°grau x2+8x=0, o valor de suas raizes

Answer 1

x^2+8x=0
x.(x+8)=0
x=0
x+8=0
x=0-8
x=-8
S={0, -8}

Answer 2

x(x +8) = 0       x= 0
 
x+8 = 0      x= -8