1.

3y2+y2-3y-1

Answer» 3y2 + y2 - 3y - 1= 4y2 - 3y - 1= 4y2 - 4y + 1y - 1= 4y( y - 1) + 1 ( y - 1)= (4y + 1) ( y - 1)


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