Question

x(x + 2)= x( 4 - x)​

Answer 1

Explicación paso a paso:

$x(x + 2) = x(4 - x) \\ x + 2 = \frac{x(4 - x)}{x} \\ x + 2 = 4 - x \\ x + x = 4 - 2 \\ 2x = 2 \\ x = 1$