The answer depends on whether it is 3x2 + 3y2 or 3x2 - 3y2.
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The GCF is 3y2
3x2+6xy+3y2= 3(x2+2xy+y2)= 3(x+y)2
3X2 + 6X + 9 3(X2 + 2 + 3) -----------------------3 is a common factor of all terms
(3y2)4*3y2*3y2*3y2*3y2 = 38*y16 = 6561y16
3xy + 3y2 = 3y (x + y)
(3x + 3y)(x + y) or 3(x + y)2
(sqrt(3)x-sqrt(3)y)(sqrt(3)x+sqrt(3)y)
(3x - y)(x - 3y) (6y - 11)(6y + 11)
The GCF is 3y2
56
All six of them
While it is possible to factor 3x2 from both of these and get 3x2(4 - 1), it's a lot easier to subtract 3x2 from 12x2 and get 9x2
factor out a 3x 3x(x-3)=3x2-9x
(x + y)(x - 3y)
(2x - 3y)(x + y)
the answer is 3x2
3x2+6xy+3y2= 3(x2+2xy+y2)= 3(x+y)2