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25h^{2}+1
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25h^{2}+1
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25h^{2}-10h+1+10h
Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(5h-1\right)^{2}.
25h^{2}+1
Combine -10h and 10h to get 0.
25h^{2}-10h+1+10h
Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(5h-1\right)^{2}.
25h^{2}+1
Combine -10h and 10h to get 0.
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