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posted by Glen Tuesday, August 31, 2010 at 1:19pm.

Factor by grouping: 30x to the third power-42x square+5x-7=

30x^3 - 42x^2 + 5x - 7 (30x^3 + 5x) + (-42x^2 - 7) 5x( 6x^2 + 1) - 7(6x^2 + 1) (6x^2 + 1) (5x - 7)

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