Ответ:
[tex]9c(7 - c) + {(3c - 11)}^{2} = 63c - 9 {c}^{2} + 9 {c}^{2} - 66c + 121 = - 3c + 121 [/tex]
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Ответ:
[tex]9c(7 - c) + {(3c - 11)}^{2} = 63c - 9 {c}^{2} + 9 {c}^{2} - 66c + 121 = - 3c + 121 [/tex]