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[tex]8 {k}^{2} + 80k + 200 \\ = 8( {k}^{2} + 10k + 25) \\ = 8 [{k}^{2} + 2(k)(5) + ({5})^{2} ] \\ = 8( k + 5) ^{2} [/tex]
[tex]8( k + 5) ^{2} [/tex]
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