Solve for y
y=\left(x+2\right)\left(x+3\right)^{2}
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y=\left(x+2\right)\left(x^{2}+6x+9\right)
Use binomial theorem \left(a+b\right)^{2}=a^{2}+2ab+b^{2} to expand \left(x+3\right)^{2}.
y=x^{3}+8x^{2}+21x+18
Use the distributive property to multiply x+2 by x^{2}+6x+9 and combine like terms.
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