Evaluate
16\left(b-H\right)^{2}
Expand
16H^{2}-32Hb+16b^{2}
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16b^{2}-32bH+16H^{2}
Use binomial theorem \left(p-q\right)^{2}=p^{2}-2pq+q^{2} to expand \left(4b-4H\right)^{2}.
16b^{2}-32bH+16H^{2}
Use binomial theorem \left(p-q\right)^{2}=p^{2}-2pq+q^{2} to expand \left(4b-4H\right)^{2}.
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