Evaluate
x\left(x+2\right)^{2}-1
Expand
x^{3}+4x^{2}+4x-1
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x\left(x^{2}+4x+4\right)-1
Use binomial theorem \left(a+b\right)^{2}=a^{2}+2ab+b^{2} to expand \left(x+2\right)^{2}.
x^{3}+4x^{2}+4x-1
Use the distributive property to multiply x by x^{2}+4x+4.
x\left(x^{2}+4x+4\right)-1
Use binomial theorem \left(a+b\right)^{2}=a^{2}+2ab+b^{2} to expand \left(x+2\right)^{2}.
x^{3}+4x^{2}+4x-1
Use the distributive property to multiply x by x^{2}+4x+4.
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