Evaluate
\left(m-10\right)\left(m-2\right)
Expand
m^{2}-12m+20
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m^{2}-12m+36-16
Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(m-6\right)^{2}.
m^{2}-12m+20
Subtract 16 from 36 to get 20.
m^{2}-12m+36-16
Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(m-6\right)^{2}.
m^{2}-12m+20
Subtract 16 from 36 to get 20.
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