How do you multiply $4a(5a - 2)$ ?

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Answer 1 · 2016-04-16T00:04:50

$4a(5a-2)=20a^2-8a$

To solve this we use the distributive property, and it goes like this:
$a(b+c) = ab + ac$

Now by applying this knowledge, we can solve this problem:
$4a(5a-2)=20a^2-8a$

How do you multiply 4a(5a - 2)4a(5a - 2)?