Evaluate
4\left(x+3\right)^{2}
Expand
4x^{2}+24x+36
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\left(2x+6\right)^{2}
Multiply 2x+6 and 2x+6 to get \left(2x+6\right)^{2}.
4x^{2}+24x+36
Use binomial theorem \left(a+b\right)^{2}=a^{2}+2ab+b^{2} to expand \left(2x+6\right)^{2}.
\left(2x+6\right)^{2}
Multiply 2x+6 and 2x+6 to get \left(2x+6\right)^{2}.
4x^{2}+24x+36
Use binomial theorem \left(a+b\right)^{2}=a^{2}+2ab+b^{2} to expand \left(2x+6\right)^{2}.
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