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Simplifying (x + -18) + (x + -1) = x2 Reorder the terms: (-18 + x) + (x + -1) = x2 Remove parenthesis around (-18 + x) -18 + x + (x + -1) = x2 Reorder the terms: -18 + x + (-1 + x) = x2 Remove parenthesis around (-1 + x) -18 + x + -1 + x = x2 Reorder the terms: -18 + -1 + x + x = x2 Combine like terms: -18 + -1 = -19 -19 + x + x = x2 Combine like terms: x + x = 2x -19 + 2x = x2 Solving -19 + 2x = x2 Solving for variable 'x'. Combine like terms: x2 + -1x2 = 0 -19 + 2x + -1x2 = 0 Begin completing the square. Divide all terms by -1 the coefficient of the squared term: Divide each side by '-1'. 19 + -2x + x2 = 0 Move the constant term to the right: Add '-19' to each side of the equation. 19 + -2x + -19 + x2 = 0 + -19 Reorder the terms: 19 + -19 + -2x + x2 = 0 + -19 Combine like terms: 19 + -19 = 0 0 + -2x + x2 = 0 + -19 -2x + x2 = 0 + -19 Combine like terms: 0 + -19 = -19 -2x + x2 = -19 The x term is -2x. Take half its coefficient (-1). Square it (1) and add it to both sides. Add '1' to each side of the equation. -2x + 1 + x2 = -19 + 1 Reorder the terms: 1 + -2x + x2 = -19 + 1 Combine like terms: -19 + 1 = -18 1 + -2x + x2 = -18 Factor a perfect square on the left side: (x + -1)(x + -1) = -18 Can't calculate square root of the right side. The solution to this equation could not be determined.
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