Evaluate
\frac{\left(11-12\beta \right)^{2}}{144}
Expand
\beta ^{2}-\frac{11\beta }{6}+\frac{121}{144}
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\frac{121}{144}-\frac{11}{6}\beta +\beta ^{2}
Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(\frac{11}{12}-\beta \right)^{2}.
\frac{121}{144}-\frac{11}{6}\beta +\beta ^{2}
Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(\frac{11}{12}-\beta \right)^{2}.
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