Factorize the following by splitting the middle term : 1/3x^2-2x-9
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1/3x^2-2x-9
=1/3(x^2-6x-27)
=1/3(x^2-9x+3x-27)
=1/3{x(x-9)+3(x-9)}
=1/3(x-9)(x+3)
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