Evaluate
4\left(a-2b\right)^{2}
Expand
4a^{2}-16ab+16b^{2}
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4a^{2}-16ab+16b^{2}
Use binomial theorem \left(p-q\right)^{2}=p^{2}-2pq+q^{2} to expand \left(2a-4b\right)^{2}.
4a^{2}-16ab+16b^{2}
Use binomial theorem \left(p-q\right)^{2}=p^{2}-2pq+q^{2} to expand \left(2a-4b\right)^{2}.
Examples
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