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Simplifying (x + -3x)(x + 9) = -27 Combine like terms: x + -3x = -2x (-2x)(x + 9) = -27 Remove parenthesis around (-2x) -2x(x + 9) = -27 Reorder the terms: -2x(9 + x) = -27 (9 * -2x + x * -2x) = -27 (-18x + -2x2) = -27 Solving -18x + -2x2 = -27 Solving for variable 'x'. Reorder the terms: 27 + -18x + -2x2 = -27 + 27 Combine like terms: -27 + 27 = 0 27 + -18x + -2x2 = 0 Begin completing the square. Divide all terms by -2 the coefficient of the squared term: Divide each side by '-2'. -13.5 + 9x + x2 = 0 Move the constant term to the right: Add '13.5' to each side of the equation. -13.5 + 9x + 13.5 + x2 = 0 + 13.5 Reorder the terms: -13.5 + 13.5 + 9x + x2 = 0 + 13.5 Combine like terms: -13.5 + 13.5 = 0.0 0.0 + 9x + x2 = 0 + 13.5 9x + x2 = 0 + 13.5 Combine like terms: 0 + 13.5 = 13.5 9x + x2 = 13.5 The x term is 9x. Take half its coefficient (4.5). Square it (20.25) and add it to both sides. Add '20.25' to each side of the equation. 9x + 20.25 + x2 = 13.5 + 20.25 Reorder the terms: 20.25 + 9x + x2 = 13.5 + 20.25 Combine like terms: 13.5 + 20.25 = 33.75 20.25 + 9x + x2 = 33.75 Factor a perfect square on the left side: (x + 4.5)(x + 4.5) = 33.75 Calculate the square root of the right side: 5.809475019 Break this problem into two subproblems by setting (x + 4.5) equal to 5.809475019 and -5.809475019.Subproblem 1
x + 4.5 = 5.809475019 Simplifying x + 4.5 = 5.809475019 Reorder the terms: 4.5 + x = 5.809475019 Solving 4.5 + x = 5.809475019 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4.5' to each side of the equation. 4.5 + -4.5 + x = 5.809475019 + -4.5 Combine like terms: 4.5 + -4.5 = 0.0 0.0 + x = 5.809475019 + -4.5 x = 5.809475019 + -4.5 Combine like terms: 5.809475019 + -4.5 = 1.309475019 x = 1.309475019 Simplifying x = 1.309475019Subproblem 2
x + 4.5 = -5.809475019 Simplifying x + 4.5 = -5.809475019 Reorder the terms: 4.5 + x = -5.809475019 Solving 4.5 + x = -5.809475019 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4.5' to each side of the equation. 4.5 + -4.5 + x = -5.809475019 + -4.5 Combine like terms: 4.5 + -4.5 = 0.0 0.0 + x = -5.809475019 + -4.5 x = -5.809475019 + -4.5 Combine like terms: -5.809475019 + -4.5 = -10.309475019 x = -10.309475019 Simplifying x = -10.309475019Solution
The solution to the problem is based on the solutions from the subproblems. x = {1.309475019, -10.309475019}
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