For some reason the answer to this question is alluding me, Im sure its probbly something simple im just over looking.

For what (numerical) value of the constant "c" is the function continous on (-?,?)?( Justify Answer)

f(x)= x^2-cx if x>-1
cx^2+x if x?-1

Your question does not make sense because you are using "?" for domain limits and in place of what should probably be a < sign in the last line.