Evaluate
\left(2x+1\right)^{3}
Expand
8x^{3}+12x^{2}+6x+1
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1+6x+12x^{2}+8x^{3}
Use binomial theorem \left(a+b\right)^{3}=a^{3}+3a^{2}b+3ab^{2}+b^{3} to expand \left(1+2x\right)^{3}.
1+6x+12x^{2}+8x^{3}
Use binomial theorem \left(a+b\right)^{3}=a^{3}+3a^{2}b+3ab^{2}+b^{3} to expand \left(1+2x\right)^{3}.
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