Question

mulityply (a-5) and (a+4)​

Answer 1

Answer:

a²-a-20

Step-by-step explanation:

  (a-5)(a+4)

∴a(a+4)-5(a+4)

∴a²+4a-5a-20

∴a²-a-20

Answer 2

Answer:

(a-5) (a+4)

Step-by-step explanation:

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

:-a2+a4-5a+20

:- a2+a9+20