PLS HELP ASAP

Write the expression 5x^10-4x^5+3 in quadratic form, if possible.

Is there more to the question?

The answer is why would a teacher ask that

This is what i found “an explicit formula designates the nth term of the sequence, as an expression of n (where n = the term's location). it defines the sequence as a formula in terms of n. this example is an arithmetic sequence(the same number, 5, is added to each term to get to the next term).” i hope this you for what your looking for. can you plz mark me brainliest?