Mark the correct alternative in the following question-If P -3 x 3-3 x 2-3 x -3 and Q -3 - 2-3 x -3- then PQ - a 3 x 3- b 3 x 3-6 x 2-6 x-6 - 6 x 2-6 x-6 d 3 x 3-6 x -

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Mark the correct alternative in the following question:

$If P = 3 x^{3} + 3 x^{2} + 3 x + 3 and Q = 3 x^{2} - 3 x + 3, then P - Q = (a) 3 x^{3} (b) 3 x^{3} + 6 x^{2} + 6 x + 6 (c) 6 x^{2} + 6 x + 6 (d) 3 x^{3} + 6 x$

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