(3x - 1)2 – (3x - 2) (3x + 1)
expension using formula
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Answer:
2(3x-1)-(3x-2)(3x+1)
(6x-2)-(3x) ^2+(-2+1)3x+(-2)(1)
6x-2-3x^2-3x-2
-3x^2+3x-4
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