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(-x)(2-x)-x(x-3)=0
We add all the numbers together, and all the variables
(-1x)(-1x+2)-x(x-3)=0
We multiply parentheses
-x^2+(-1x)(-1x+2)+3x=0
We multiply parentheses ..
-x^2+(+x^2-2x)+3x=0
We add all the numbers together, and all the variables
-1x^2+(+x^2-2x)+3x=0
We get rid of parentheses
-1x^2+x^2-2x+3x=0
We add all the numbers together, and all the variables
x=0
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