When nine is x2+8, x=8 is ten (nine points).

Solution tx=6, x=- 90 (truncated) ((2 points, 9 points if not truncated).

A: The total profit in the first six months is equal to 800,000 yuan;

(2) Nine equals x2+8, and X equals nine equals two equals x(2 points).

Solution tx= 10, x= 0 (omitted) (2 points, 9 points will be deducted if not omitted)

A: When x is ten,

Total profit of 9 to x months after using recovery purification equipment.

It is equal to the sum of profits in X and June when no recovery and purification equipment is installed.

(3) 92 (99× 99 2+8)+ 92 [92 (99× 99 2+8)- 99 (99× 99 +8)] = 692 (ten thousand yuan) (2 points)

Therefore, the total profit of two years after using the recycling purification equipment is 6.92 million yuan.