(5-y)^2+y^2=21

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Solution for (5-y)^2+y^2=21 equation: 



(5-y)^2+y^2=21

We move all terms to the left:

(5-y)^2+y^2-(21)=0

We add all the numbers together, and all the variables

y^2+(-1y+5)^2-21=0

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

y^2+(-1y+5)^2=21

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