Помогите решить x^2-2x=x+2-x^2

Question

Помогите решить x^2-2x=x+2-x^2

Answer 1

X^2 - 2x = x + 2 - x^2
x^2 - 2x - x - 2 + x^2 = 0 
2x^2 - 3x - 2 = 0 
D = 9 + 4*4 = 16 + 9 = 25
x1 = ( 3 + 5)/4 = 8/4 = 2
x2 = ( 3 - 5 )/4 = - 2/4 = - 1/2 = - 0,5

Answer 2

2x^2-3x-2=0
D^2=9+16=25
D=5
x=2 ; -0.5