-2x^2+12x-18
-2x2 + 12x - 18 = 0Делим на 2:-x2 + 6x - 9 = 0D = b2 - 4acD = 36 - 36 = 0
x = - b/2ax = 6/2= 3ответ: x = 3
ax^2+bx+c=a(x-x1)(x-x2)
-2x^2+12x-18=-2(x-3)(x-3)
-2x^2+12x-18
-2x2 + 12x - 18 = 0
Делим на 2:
-x2 + 6x - 9 = 0
D = b2 - 4ac
D = 36 - 36 = 0
x = - b/2a
x = 6/2= 3
ответ: x = 3
ax^2+bx+c=a(x-x1)(x-x2)
-2x^2+12x-18=-2(x-3)(x-3)