Verified Answer :

ameeki

First lets simplify the first term and yield (2a)

The second term:
1.   2a * (-1/2) = -a
2.   -a + a = 0

Now we have simplified both terms to: (2a) (0)

Anything multiplied by 0 is 0, so the answer is also 0. 

Billymkhoi

a(2)(2a(-1/2)+a)
= (2a)(-1a+a)
=(2a)(-a+a)
=(2a)*0
=0

So 0 is the final answer.

Hope this would help :))

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