Expand
9x^{2}+6x+4
Evaluate
\left(3x+1\right)^{2}+3
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9x^{2}+6x+1+3
Use binomial theorem \left(a+b\right)^{2}=a^{2}+2ab+b^{2} to expand \left(3x+1\right)^{2}.
9x^{2}+6x+4
Add 1 and 3 to get 4.
9x^{2}+6x+1+3
Use binomial theorem \left(a+b\right)^{2}=a^{2}+2ab+b^{2} to expand \left(3x+1\right)^{2}.
9x^{2}+6x+4
Add 1 and 3 to get 4.
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