Question

como resolver x²+4x?

Answer 1

x^2 + 4x = 0

x (x + 4) = 0

x' = 0

e

x + 4 = 0

x" = -4

S = {0; -4}

Answer 2

x²+4x = 0

x( x + 4) = 0

x1 = 0

x2 + 4 = 0 ==> x2 = - 4