Answer
$27x^3+27x^2y+9xy^2+y^3$
Work Step by Step
Use the binomial theorem formula (detailed on page 754) to solve the problem. Be careful in writing each term correctly.
$(3x+y)^3$
$1*(3x)^3+3*(3x)^2*(y)+3*(3x)*(y)^2+1*(y)^3$
$27x^3+27x^2y+9xy^2+y^3$
