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Simplifying 2cos * 2x + -4cosx + 3 = 0 Reorder the terms for easier multiplication: 2 * 2cos * x + -4cosx + 3 = 0 Multiply 2 * 2 4cos * x + -4cosx + 3 = 0 Multiply cos * x 4cosx + -4cosx + 3 = 0 Reorder the terms: 3 + 4cosx + -4cosx = 0 Combine like terms: 4cosx + -4cosx = 0 3 + 0 = 0 3 = 0 Solving 3 = 0 Couldn't find a variable to solve for. This equation is invalid, the left and right sides are not equal, therefore there is no solution.
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