12. Factorise the following expressions.
(a) –3(3x – 2)² – (3x – 2)
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Answer: ( 3x - 2 )[ -9x + 5 )
Step-by-step explanation: As (3x -2 is common)
Take (3x-2) out, so we are left with (3x-2) [-3 (3x-2) - 1]
(3x-2) [ -9x + 6 - 1 ]
(3x-2) [ -9x + 5]
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