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(v+6)^2=2v^2+10v+28
We move all terms to the left:
(v+6)^2-(2v^2+10v+28)=0
We get rid of parentheses
-2v^2+(v+6)^2-10v-28=0
We add all the numbers together, and all the variables
-2v^2-10v+(v+6)^2-28=0
We move all terms containing v to the left, all other terms to the right
-2v^2-10v+(v+6)^2=28
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