A^2=10a-21

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Solution for A^2=10a-21 equation: 



^2=10A-21

We move all terms to the left:

^2-(10A-21)=0

We add all the numbers together, and all the variables

-(10A-21)=0

We get rid of parentheses

-10A+21=0

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

-10A=-21

A=-21/-10

A=2+1/10

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