Answer:
4y
Explanation:
16 12 4 ---- all could be divided by 4
4 3 1 ---- no more common factors
GCF = 4y --- there are 3 y's in the problem, find the one with the smallest power and use it and the smallest power in this case is y^1
every part of the equation can be evenly divided by 4 and y
so this leaves you with 4y (-4 + 3y - 1)
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