Answer:
Explanation:
1 . remove the negative by factoring out that first:
-(y^2-3y-4).
2 . Then try to find a common pair. In this case, its going to be -4 and 1.
-(y+1)(y-4).
3 . Lastly, bring back the negative by factoring it into one of the equations.
(1-y)(y-4).