Question

решите уравнение 0,4x(5x-2)+9,6=2x(2+x)

Answer 1

$2 x^{2} -0,8x+9,6=4x+2 x^{2}$
-4,8x+9,6=0
x=2

Answer 2

-4,8x+9,6=0

Answer 3

x=2