How do you simplify $(-a)(a+3)$ ?

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Answer 1 · 2016-08-07T09:07:50

$(-a)(a+3) =-a^2-3a$

The distributive property of multiplication states that for any $a, b, c$ , we have

$a(b+c) = ab + ac$

Applying that here, we get

$(-a)(a+3) = (-a)a+(-a)3 =-a^2-3a$

How do you simplify (-a)(a+3)(-a)(a+3)?