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3c^2+56=-135 what is the solution​

3c^2+56=-135 what is the solution​-example-1
User Gant
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3 {c}^(2) + 56 = - 136 \\ \Leftrightarrow 3 {c}^(2) = - 192 \\ \Leftrightarrow {c}^(2) = - 64 \\ \Leftrightarrow c = \pm8i

User Askb
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