Those lengths will NOT form a triangle.
According to the triangle inequality theorem, the longest side has to be LESS than the sum of the other 2 sides.
<span>3a4y3 − 12a3y2 + 6a2y
=3a^2y (a^2y^2 - 4ay + 2)
answer is </span>3a^2y (a^2y^2 - 4ay + 2) (second choice)
