Persamaan kuadrat
[tex]p(p - 3) = 40 \\ {p}^{2} - 3l - 40 = 0 \\ (p - 8)(p - 5) = 0 \\ p = 8\: cm \\ l = 5 \: cm \\ \\ B. \: 8 \: cm \: dan \: 5 \: cm[/tex]
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Persamaan kuadrat
[tex]p(p - 3) = 40 \\ {p}^{2} - 3l - 40 = 0 \\ (p - 8)(p - 5) = 0 \\ p = 8\: cm \\ l = 5 \: cm \\ \\ B. \: 8 \: cm \: dan \: 5 \: cm[/tex]