x²+4x=0
x(x+4)=0
x=0 v x+4=0
x∈{-4, 0{
x1 = 0
x2 = 4
(x - x1) * (x - x2) = 0
(x - 0) * (x - (-4) )= 0
x * (x + 4) = 0
x^2 + 4x = 0 ----- odpwoiedx
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x²+4x=0
x(x+4)=0
x=0 v x+4=0
x∈{-4, 0{
x1 = 0
x2 = 4
(x - x1) * (x - x2) = 0
(x - 0) * (x - (-4) )= 0
x * (x + 4) = 0
x^2 + 4x = 0 ----- odpwoiedx