A=(2a+6)2

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Solution for A=(2a+6)2 equation: 



=(2A+6)2

We move all terms to the left:

-((2A+6)2)=0



We calculate terms in parentheses: -((2A+6)2), so:

(2A+6)2

We multiply parentheses

4A+12

Back to the equation:

-(4A+12)



We get rid of parentheses

-4A-12=0

We move all terms containing A to the left, all other terms to the right

-4A=12

A=12/-4

A=-3

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