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Simplifying x2 + 2x + (3 + -1n) = 0 Remove parenthesis around (3 + -1n) x2 + 2x + 3 + -1n = 0 Reorder the terms: 3 + -1n + 2x + x2 = 0 Solving 3 + -1n + 2x + x2 = 0 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -1n + 2x + -3 + x2 = 0 + -3 Reorder the terms: 3 + -3 + -1n + 2x + x2 = 0 + -3 Combine like terms: 3 + -3 = 0 0 + -1n + 2x + x2 = 0 + -3 -1n + 2x + x2 = 0 + -3 Combine like terms: 0 + -3 = -3 -1n + 2x + x2 = -3 Add '-2x' to each side of the equation. -1n + 2x + -2x + x2 = -3 + -2x Combine like terms: 2x + -2x = 0 -1n + 0 + x2 = -3 + -2x -1n + x2 = -3 + -2x Add '-1x2' to each side of the equation. -1n + x2 + -1x2 = -3 + -2x + -1x2 Combine like terms: x2 + -1x2 = 0 -1n + 0 = -3 + -2x + -1x2 -1n = -3 + -2x + -1x2 Divide each side by '-1'. n = 3 + 2x + x2 Simplifying n = 3 + 2x + x2
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