(x+7)^2+x^2=13^2

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Solution for (x+7)^2+x^2=13^2 equation: 



(x+7)^2+x^2=13^2

We move all terms to the left:

(x+7)^2+x^2-(13^2)=0

We add all the numbers together, and all the variables

x^2+(x+7)^2-169=0

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

x^2+(x+7)^2=169

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