4=2(a-7)2

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Solution for 4=2(a-7)2 equation: 



4=2(a-7)2

We move all terms to the left:

4-(2(a-7)2)=0



We calculate terms in parentheses: -(2(a-7)2), so:

2(a-7)2

We multiply parentheses

4a-28

Back to the equation:

-(4a-28)



We get rid of parentheses

-4a+28+4=0

We add all the numbers together, and all the variables

-4a+32=0

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

-4a=-32

a=-32/-4

a=+8

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