Answer :

Answer:

a^2 +2a -15

Step-by-step explanation:

(a+5)(a-3)

FOIL

First: a*a = a^2

outer: -3a

inner: 5a

last: 5(-3) = -15

Add them together

a^2 -3a+5a -15

a^2 +2a -15

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