View Compilation Error

0_0_18933262_6917.cpp: In function 'int main()':
0_0_18933262_6917.cpp:31:34: error: invalid operands of types '__gnu_cxx::__enable_if<true, double>::__type {aka double}' and 'int' to binary 'operator%'
         if((t1+sqrt(t1*t1-4*t2))%2==0&&(t1-sqrt(t1*t1-4*t2))%2==0)
                                  ^
0_0_18933262_6917.cpp:31:62: error: invalid operands of types '__gnu_cxx::__enable_if<true, double>::__type {aka double}' and 'int' to binary 'operator%'
         if((t1+sqrt(t1*t1-4*t2))%2==0&&(t1-sqrt(t1*t1-4*t2))%2==0)
                                                              ^