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Simplifying x2 + -9x = -13 Reorder the terms: -9x + x2 = -13 Solving -9x + x2 = -13 Solving for variable 'x'. Reorder the terms: 13 + -9x + x2 = -13 + 13 Combine like terms: -13 + 13 = 0 13 + -9x + x2 = 0 Begin completing the square. Move the constant term to the right: Add '-13' to each side of the equation. 13 + -9x + -13 + x2 = 0 + -13 Reorder the terms: 13 + -13 + -9x + x2 = 0 + -13 Combine like terms: 13 + -13 = 0 0 + -9x + x2 = 0 + -13 -9x + x2 = 0 + -13 Combine like terms: 0 + -13 = -13 -9x + x2 = -13 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 + 20.25 Reorder the terms: 20.25 + -9x + x2 = -13 + 20.25 Combine like terms: -13 + 20.25 = 7.25 20.25 + -9x + x2 = 7.25 Factor a perfect square on the left side: (x + -4.5)(x + -4.5) = 7.25 Calculate the square root of the right side: 2.692582404 Break this problem into two subproblems by setting (x + -4.5) equal to 2.692582404 and -2.692582404.Subproblem 1
x + -4.5 = 2.692582404 Simplifying x + -4.5 = 2.692582404 Reorder the terms: -4.5 + x = 2.692582404 Solving -4.5 + x = 2.692582404 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 = 2.692582404 + 4.5 Combine like terms: -4.5 + 4.5 = 0.0 0.0 + x = 2.692582404 + 4.5 x = 2.692582404 + 4.5 Combine like terms: 2.692582404 + 4.5 = 7.192582404 x = 7.192582404 Simplifying x = 7.192582404Subproblem 2
x + -4.5 = -2.692582404 Simplifying x + -4.5 = -2.692582404 Reorder the terms: -4.5 + x = -2.692582404 Solving -4.5 + x = -2.692582404 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 = -2.692582404 + 4.5 Combine like terms: -4.5 + 4.5 = 0.0 0.0 + x = -2.692582404 + 4.5 x = -2.692582404 + 4.5 Combine like terms: -2.692582404 + 4.5 = 1.807417596 x = 1.807417596 Simplifying x = 1.807417596Solution
The solution to the problem is based on the solutions from the subproblems. x = {7.192582404, 1.807417596}
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