Question

Решите пожалуйста уравнение, срочно  
-2х^2+4х-7=-х^2+2х-(х^2-3)

Answer 1

-2x^2 + 4x - 7 = -x^2 + 2x - (x^2 -3)
-2x^2 + 4x - 7 = -x^2 + 2x - x^2 + 3
-2x^2 + 4x - 7 = -2x^2 + 2x + 3
4x - 7 = 2x + 3
2x = 10
x = 5

Answer 2

-2x² + 4x - 7 = -x² + 2x - x² + 3
-2x² + 2x² + 2x = 10
2x = 10
x = 5