When asked to factor the trinomial 8x2-8x-16, a student gives the answer (x-2) (x+1. What is one thing wrong with this answer?

Missing Bracket. The factored equation has an open bracket, but no closing bracket.

One thing wrong is there is not closing parenthasees after x+1

and also, if you multiply it out, the answer is not 8x^2-8x-16 so the factored form given is worng

the real factored out form is 8 (x-2) (x+1)

that person forgot the 8 in the front