You can't form a triangle. A+b is less than or equal to C, then 2a is less than or equal to C. When 2a=c, you should make 2aX square -C square =0 X= 1 less than 0 and less than 1, and the solution will come out. Forgot to type It's hard to say. I also took the college entrance examination this year, with a total score of 584. Now Central South University has scored 134 in the math exam. It's simple.