Expand
81z^{2}+198z+121
Evaluate
\left(9z+11\right)^{2}
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81z^{2}+198z+121
Use binomial theorem \left(a+b\right)^{2}=a^{2}+2ab+b^{2} to expand \left(9z+11\right)^{2}.
81z^{2}+198z+121
Use binomial theorem \left(a+b\right)^{2}=a^{2}+2ab+b^{2} to expand \left(9z+11\right)^{2}.
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