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4m+1
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4m+1
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4m^{2}-4m+1-4m\left(m-2\right)
Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(2m-1\right)^{2}.
4m^{2}-4m+1-4m^{2}+8m
Use the distributive property to multiply -4m by m-2.
-4m+1+8m
Combine 4m^{2} and -4m^{2} to get 0.
4m+1
Combine -4m and 8m to get 4m.
4m^{2}-4m+1-4m\left(m-2\right)
Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(2m-1\right)^{2}.
4m^{2}-4m+1-4m^{2}+8m
Use the distributive property to multiply -4m by m-2.
-4m+1+8m
Combine 4m^{2} and -4m^{2} to get 0.
4m+1
Combine -4m and 8m to get 4m.
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