I'd say yes, have a go at it again. First you need to figure out why exactly you got an E. Did you really understand the material? Can you explain why we do algebra, where a quadratic comes from, why we solve a cubic and why the laws of indices work? Why 7^0=1? What is differentiation? That kind of thing. If you can, then you'll do better next time. If not, that's why you got an E.