(0.5+x)2=21

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Solution for (0.5+x)2=21 equation: 



(0.5+x)2=21

We move all terms to the left:

(0.5+x)2-(21)=0

We add all the numbers together, and all the variables

(x+0.5)2-21=0

We multiply parentheses

2x+1-21=0

We add all the numbers together, and all the variables

2x-20=0

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

2x=20

x=20/2

x=10

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