96.5k views
2 votes
Factorise a squared - a -20

1 Answer

6 votes

Answer:

(a-5)(a+4)

Explanation:


a^(2)-a-20


a^(2)+4a-5a-20

a(a+4) -5(a+4)

(a-5)(a+4)

User INS
by
3.3k points