\(3x^2-6x-x-2-\left(3x^2+x+6x+2\right)=0\)
\(3x^2-6x-x-2-3x^2-x-6x-2=0\)
\(3x^2-3x^2-6x-x-x-6x-2-2=0\)
\(-14x-4=0\)
\(-14x=4\)
\(x=-\dfrac{2}{7}\)
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=>3x(x-2)+(x+2)(-1-3x-2)=0
=>3x(x-2)+(x+2)(-3x-1)=0
=>3x^2-6x-3x^2-x-6x-2=0
=>-13x=2
=>x=-2/13
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