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\left(11m\right)^{2}-3^{2}
Multiplication can be transformed into difference of squares using the rule: \left(a-b\right)\left(a+b\right)=a^{2}-b^{2}.
11^{2}m^{2}-3^{2}
Expand \left(11m\right)^{2}.
121m^{2}-3^{2}
Calculate 11 to the power of 2 and get 121.
121m^{2}-9
Calculate 3 to the power of 2 and get 9.
\left(11m\right)^{2}-3^{2}
Multiplication can be transformed into difference of squares using the rule: \left(a-b\right)\left(a+b\right)=a^{2}-b^{2}.
11^{2}m^{2}-3^{2}
Expand \left(11m\right)^{2}.
121m^{2}-3^{2}
Calculate 11 to the power of 2 and get 121.
121m^{2}-9
Calculate 3 to the power of 2 and get 9.