Question

Помогите решить задание #4

Answer 1

x2 - x +9=(x+2)2
x2-x+9=x2+4x+4
x2-x-x2-4x=4-9
-5x=-5
x=5/5
x=1

Answer 2

x²-x+9 = (x+2)²
x² - x + 9 = x² +4x + 4
x² - x² - x - 4x =  4 - 9
-5x = -5
x = 1