Объяснение:
(2x+1)^2=4x^2+4x+1
4x^2+4x+1 - x- 1 =
25 3
3x-1 - 4x^2+4x+1 =
3 25 75
25x-25 - (12x^2+12x+3)
75
25*(x-1)-(12x^2+12x+3)
x-1-12x^2-12x-3
3
11x-4-12x^2
Объяснение:
(2x+1)^2=4x^2+4x+1
4x^2+4x+1 - x- 1 =
25 3
3x-1 - 4x^2+4x+1 =
3 25 75
25x-25 - (12x^2+12x+3)
75
25*(x-1)-(12x^2+12x+3)
75
x-1-12x^2-12x-3
3
11x-4-12x^2
3