Answer
$y^3+6y^2+12y+8$
Work Step by Step
Use the formula $(a+b)^3=a^3+3a^2b+3ab^2+b^3$ , we have:
$(y+2)^3=y^3+3y^2(2)+3y(2)^2+(2)^3=y^3+6y^2+12y+8$
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