What are the first three terms of the sequence represented by the recursive formula

A recursive formula designates the starting term, a1, and the nth term of the sequence, an , as an expression containing the previous term (the term before it), an-1. ... Find a recursive formula. This example is an arithmetic sequence (the same number, 5, is added to each term to get to the next term).

Hello,

4u²+8u=4u(u+2)

zeroes are 0 and -2