Originally Posted by

**chiro** Hey n22.

The concept of span is to find a set of vectors where you take an input set and produce an output set of vectors whereby you can write all the input vectors as linear combinations of your output vectors.

So since you have P2 (all polynomials of degree 2) you need to show that given the set X you can write all polynomials P2 using linear combinations of the vectors in X.

Hint: Show that all vectors in X are independent and show that as a result all vectors in P2 can be written as a linear combination.