Question

Решите уравнение: 1) (х-2)х -х(х+2)+0,2=0 2) х(3-х) + х(3+х) - 0,0005=0. Дам 34 бала!!!!!!

Answer 1

$1) {x}^{2} - 2x - {x}^{2} - 2x + 0.2 = 0 \\ - 4x + 0.2 = 0 \\ - 4x = 0.2 \\ x = - 0.05$
$2)3x - {x}^{2} + 3x + {x}^{2} - 0.0005 = 0 \\ 6x - 0.0005 = 0 \\ 6x = 0.0005 \\ x = \frac{1}{12000}$