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Simplifying x2 + 2x = x2 + 2x + 4 Reorder the terms: 2x + x2 = x2 + 2x + 4 Reorder the terms: 2x + x2 = 4 + 2x + x2 Add '-2x' to each side of the equation. 2x + -2x + x2 = 4 + 2x + -2x + x2 Combine like terms: 2x + -2x = 0 0 + x2 = 4 + 2x + -2x + x2 x2 = 4 + 2x + -2x + x2 Combine like terms: 2x + -2x = 0 x2 = 4 + 0 + x2 x2 = 4 + x2 Add '-1x2' to each side of the equation. x2 + -1x2 = 4 + x2 + -1x2 Combine like terms: x2 + -1x2 = 0 0 = 4 + x2 + -1x2 Combine like terms: x2 + -1x2 = 0 0 = 4 + 0 0 = 4 Solving 0 = 4 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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