Factorise using identities

i .   9 x 2 - 6 x + 1 i i .   3 x + 2 y 2 - 2 + a - 2 b 2

Dear Student,
i 9x2-6x+1=9x2-3x-3x+1                         =3x3x-1-13x-1                         =3x-13x-1ii 3x+2y2-2+a-2b2=3x+2y+2+a-2b3x+2y-2+a-2b     a2-b2=a+ba-b                                                =3x+2y+2+a-2b3x+2y-2-a+2b    
Regards

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