Question

equacao em R x(x+2)=4x

Answer 1

x^2+2x=4x
x^2+2x-4x=0
x^2-2x=0
Delta= (-2)^2-4.1.0
Delta=4
(Bháskara) 2+(mais ou menos) raiz de 4 / 2.1
2 (mais ou menos)2/2
x'=2+2=4/2=2
x"=2-2=0/2=0


x'=2
x"=0

Answer 2

x.(x + 2) = 4x
x² + 2x = 4x
x² + 2x - 4x = 0
x² - 2x = 0
x(x - 2) = 0

x = 0
x - 2 = 0
x = 2

Resp.: x = 0; x = 2.