Factories:x^3-3x^2-9x-5
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x^3 - 3x^2 -9x -5
x^3 + x^2 - 4x^2 -4x -5x -5
x^2( x+1) -4x( x+1) -5( x+1)
( x+1)( x^2 - 4x -5)
( x+1) ( x^2 + x -5x -5)
( x+1)( x(x+1) -5(x+1))
( x+1)( x+1)( x-5)
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