Question

(3x + 1)(9x2 – 3x +1) – (3x - 1)(9x² + 3x +1)
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Answer 1

Answer:

( 3x + 1 ) ( 9 × 2 - 3x + 1 ) - ( 3x - 1 ) ( 9x² + 3x + 1 )

( 3x + 3x + 3x - 3x ) ( 2 × 9 + 1 + 1 + 1 - 1 ) ( 9x²)

( 9x - 3x ) ( 20 ) ( 9x ² )

6x + 20 + 9x²

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