SOLUTION: factoring trinomials by grouping 12y^3+28y^2+16y

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Question 57340: factoring trinomials by grouping
12y^3+28y^2+16y
Answer by Nate(3500) About Me  (Show Source):
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12y^3 + 28y^2 + 16y
4y(3y^2 + 7y + 4)
4y(3y^2 + 3y + 4y + 4)
4y((3y^2 + 3y) + (4y + 4))
4y(3y(y + 1) + 4(y + 1))
4y(3y + 4)(y + 1)