Solution
所有跟帖:
• 这个解法里面没有得出c=0 -怪哉- ♂ (100 bytes) () 10/16/2015 postreply 19:25:38
• Thanks -dr_yin- ♂ (0 bytes) () 10/17/2015 postreply 10:57:34
• fully expand your equations, c^2 = 49 * a^2 -mondayadvisor- ♀ (290 bytes) () 10/17/2015 postreply 12:14:15
• Thanks. -dr_yin- ♂ (0 bytes) () 10/17/2015 postreply 16:18:24
• different way to solve it -mondayadvisor- ♀ (1131 bytes) () 10/16/2015 postreply 20:15:17