Evaluate
\left(9h-11k\right)^{2}
Expand
81h^{2}-198hk+121k^{2}
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\left(9h-11k\right)^{2}
Multiply 9h-11k and 9h-11k to get \left(9h-11k\right)^{2}.
81h^{2}-198hk+121k^{2}
Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(9h-11k\right)^{2}.
\left(9h-11k\right)^{2}
Multiply 9h-11k and 9h-11k to get \left(9h-11k\right)^{2}.
81h^{2}-198hk+121k^{2}
Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(9h-11k\right)^{2}.
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