(21-y)^2+y^2=225

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Solution for (21-y)^2+y^2=225 equation: 



(21-y)^2+y^2=225

We move all terms to the left:

(21-y)^2+y^2-(225)=0

We add all the numbers together, and all the variables

y^2+(-1y+21)^2-225=0

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

y^2+(-1y+21)^2=225

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