1 = x-1
2 = x
3 = x + 1
4 = x + 2
(1 × 3 + 17) - 2 × 4 = 0 =>
=> ( ( x - 1 ) × ( x + 1 ) + 17 ) - x × ( x + 2 ) =0
=> 1 = x - 1 = 7
2 = x = 8
3 = x + 1 = 9
4 = x + 2 = 10
●《☆Я смог !?☆》●
1 = x-1
2 = x
3 = x + 1
4 = x + 2
(1 × 3 + 17) - 2 × 4 = 0 =>
=> ( ( x - 1 ) × ( x + 1 ) + 17 ) - x × ( x + 2 ) =0
=> 1 = x - 1 = 7
2 = x = 8
3 = x + 1 = 9
4 = x + 2 = 10
●《☆Я смог !?☆》●