x^2 - x + 9 = x+2x + 2x+2^2x^2 - x + 9 = x^2 + 4x + 4-x + 9 = 4x + 49 - 4 = 4x + x5 = 5xx = 1
Ответ: x = 1.
x^2 - x + 9 = x+2x + 2x+2^2
x^2 - x + 9 = x^2 + 4x + 4
-x + 9 = 4x + 4
9 - 4 = 4x + x
5 = 5x
x = 1
Ответ: x = 1.