Question 39793
factor x2+4xy+4y^2-16

= (x+2y)^2-4^2
=(x+2y-4)(x+2y+4)

factor 12(x+1)^2-17(x+1)+6

=[(4(x+1)-3)][(3(x+1)-2]

=[4x+1][3x+1]
Cheers,
Stan H.