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Simplifying 2cos2x + -7cosx + 3 = 0 Reorder the terms: 3 + -7cosx + 2cos2x = 0 Solving 3 + -7cosx + 2cos2x = 0 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -7cosx + -3 + 2cos2x = 0 + -3 Reorder the terms: 3 + -3 + -7cosx + 2cos2x = 0 + -3 Combine like terms: 3 + -3 = 0 0 + -7cosx + 2cos2x = 0 + -3 -7cosx + 2cos2x = 0 + -3 Combine like terms: 0 + -3 = -3 -7cosx + 2cos2x = -3 Reorder the terms: 3 + -7cosx + 2cos2x = -3 + 3 Combine like terms: -3 + 3 = 0 3 + -7cosx + 2cos2x = 0 The solution to this equation could not be determined.
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