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(3x-5)^(2)-13(3x-5)+40=0
We multiply parentheses
(3x-5)^2-39x+65+40=0
We add all the numbers together, and all the variables
-39x+(3x-5)^2+105=0
We move all terms containing x to the left, all other terms to the right
-39x+(3x-5)^2=-105
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