Solve the equation in the complex number system:
7c(−4c−9)11+3(−4c−9)10=0\displaystyle {7}{c}{\left(-{4}{c}-{9}\right)}^{{11}}+{3}{\left(-{4}{c}-{9}\right)}^{{10}}={0}7c(−4c−9)11+3(−4c−9)10=0
c={\displaystyle {c}={\lbrace}c={ }\displaystyle {\rbrace}} If there are multiple solutions, separate them with a comma.
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