Question

а) х^2 + 2х = 0; б) 4х – 2х^2 = 0.

Answer 1

$a) \: x ^{2} + 2x = 0$

$x \times (x + 2) = 0$

$x = 0$

$x + 2 = 0$

$x = - 2$

$б) \: 4x - 2x^{2} = 0$

$2x \times (2 - x) = 0$

$x \times (2 - x)=0$

$x = 0$

$2 - x = 0$

$- x = - 2$

$x = 2$