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Simplifying (c2 + c + -1)(c2 + 5c + -7) = 0 Reorder the terms: (-1 + c + c2)(c2 + 5c + -7) = 0 Reorder the terms: (-1 + c + c2)(-7 + 5c + c2) = 0 Multiply (-1 + c + c2) * (-7 + 5c + c2) (-1(-7 + 5c + c2) + c(-7 + 5c + c2) + c2(-7 + 5c + c2)) = 0 ((-7 * -1 + 5c * -1 + c2 * -1) + c(-7 + 5c + c2) + c2(-7 + 5c + c2)) = 0 ((7 + -5c + -1c2) + c(-7 + 5c + c2) + c2(-7 + 5c + c2)) = 0 (7 + -5c + -1c2 + (-7 * c + 5c * c + c2 * c) + c2(-7 + 5c + c2)) = 0 (7 + -5c + -1c2 + (-7c + 5c2 + c3) + c2(-7 + 5c + c2)) = 0 (7 + -5c + -1c2 + -7c + 5c2 + c3 + (-7 * c2 + 5c * c2 + c2 * c2)) = 0 (7 + -5c + -1c2 + -7c + 5c2 + c3 + (-7c2 + 5c3 + c4)) = 0 Reorder the terms: (7 + -5c + -7c + -1c2 + 5c2 + -7c2 + c3 + 5c3 + c4) = 0 Combine like terms: -5c + -7c = -12c (7 + -12c + -1c2 + 5c2 + -7c2 + c3 + 5c3 + c4) = 0 Combine like terms: -1c2 + 5c2 = 4c2 (7 + -12c + 4c2 + -7c2 + c3 + 5c3 + c4) = 0 Combine like terms: 4c2 + -7c2 = -3c2 (7 + -12c + -3c2 + c3 + 5c3 + c4) = 0 Combine like terms: c3 + 5c3 = 6c3 (7 + -12c + -3c2 + 6c3 + c4) = 0 Solving 7 + -12c + -3c2 + 6c3 + c4 = 0 Solving for variable 'c'. The solution to this equation could not be determined.
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