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(3.6+2x)^2=-0.1764x+0.049x^2
We move all terms to the left:
(3.6+2x)^2-(-0.1764x+0.049x^2)=0
We add all the numbers together, and all the variables
-(-0.1764x+0.049x^2)+(2x+3.6)^2=0
We get rid of parentheses
-0.049x^2+0.1764x+(2x+3.6)^2=0
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