Bracket 9x square minus 1 bracket close minus bracket 1 plus 3x bracket close square
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9xsquare-3x-2=0
9xsquare-6x+3x-2 =0
3x(3x-2)+1(3x-2)=0
3x-2=0 / 3x+1 =0
x=2/3 / x = -1/3
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