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