I'll bet this was a partial fraction problem and you copied the wrong denominators either on the left side or the right side. However, I'll solve the problem that you posted anyway: Substituting x=0 and simplifyingSubstituting x=4 and simplifying Substituting x=-3 and simplifying Solve the system: Solve that system and get , , Then your answer would be: But I'll bet you you copied those denominators wrong!!!! Edwin