Question

Решите уравнение:
(x-2)(x+1)-(x-1)(x+2)+0,2=0

Answer 1

(x-2)(x+1)-(x-1)(x+2)+0,2=0

$x^{2}$ +x -2x -2 -($x^{2}$+2x-x-2) +0.2=0
$x^{2}$ -x -2 - $x^{2}$ -x+2 +0.2=0
-2x=-0.2
x=0.1

Answer 2

1х+3х+0.2=0
4х+0.2=0
0.2:4=0.05