(5+a)2=20

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Solution for (5+a)2=20 equation: 



(5+a)2=20

We move all terms to the left:

(5+a)2-(20)=0

We add all the numbers together, and all the variables

(a+5)2-20=0

We multiply parentheses

2a+10-20=0

We add all the numbers together, and all the variables

2a-10=0

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

2a=10

a=10/2

a=5

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