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Simplifying cos2x + 5cosx + -6 = 0 Reorder the terms: -6 + 5cosx + cos2x = 0 Solving -6 + 5cosx + cos2x = 0 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '6' to each side of the equation. -6 + 5cosx + 6 + cos2x = 0 + 6 Reorder the terms: -6 + 6 + 5cosx + cos2x = 0 + 6 Combine like terms: -6 + 6 = 0 0 + 5cosx + cos2x = 0 + 6 5cosx + cos2x = 0 + 6 Combine like terms: 0 + 6 = 6 5cosx + cos2x = 6 Reorder the terms: -6 + 5cosx + cos2x = 6 + -6 Combine like terms: 6 + -6 = 0 -6 + 5cosx + cos2x = 0 The solution to this equation could not be determined.
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