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Simplifying cos2x + -11cosx + -10 = 0 Reorder the terms: -10 + -11cosx + cos2x = 0 Solving -10 + -11cosx + cos2x = 0 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '10' to each side of the equation. -10 + -11cosx + 10 + cos2x = 0 + 10 Reorder the terms: -10 + 10 + -11cosx + cos2x = 0 + 10 Combine like terms: -10 + 10 = 0 0 + -11cosx + cos2x = 0 + 10 -11cosx + cos2x = 0 + 10 Combine like terms: 0 + 10 = 10 -11cosx + cos2x = 10 Reorder the terms: -10 + -11cosx + cos2x = 10 + -10 Combine like terms: 10 + -10 = 0 -10 + -11cosx + cos2x = 0 The solution to this equation could not be determined.
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