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Simplifying x2 + -3x + 9 = 47 Reorder the terms: 9 + -3x + x2 = 47 Solving 9 + -3x + x2 = 47 Solving for variable 'x'. Reorder the terms: 9 + -47 + -3x + x2 = 47 + -47 Combine like terms: 9 + -47 = -38 -38 + -3x + x2 = 47 + -47 Combine like terms: 47 + -47 = 0 -38 + -3x + x2 = 0 Begin completing the square. Move the constant term to the right: Add '38' to each side of the equation. -38 + -3x + 38 + x2 = 0 + 38 Reorder the terms: -38 + 38 + -3x + x2 = 0 + 38 Combine like terms: -38 + 38 = 0 0 + -3x + x2 = 0 + 38 -3x + x2 = 0 + 38 Combine like terms: 0 + 38 = 38 -3x + x2 = 38 The x term is -3x. Take half its coefficient (-1.5). Square it (2.25) and add it to both sides. Add '2.25' to each side of the equation. -3x + 2.25 + x2 = 38 + 2.25 Reorder the terms: 2.25 + -3x + x2 = 38 + 2.25 Combine like terms: 38 + 2.25 = 40.25 2.25 + -3x + x2 = 40.25 Factor a perfect square on the left side: (x + -1.5)(x + -1.5) = 40.25 Calculate the square root of the right side: 6.34428877 Break this problem into two subproblems by setting (x + -1.5) equal to 6.34428877 and -6.34428877.Subproblem 1
x + -1.5 = 6.34428877 Simplifying x + -1.5 = 6.34428877 Reorder the terms: -1.5 + x = 6.34428877 Solving -1.5 + x = 6.34428877 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.5' to each side of the equation. -1.5 + 1.5 + x = 6.34428877 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + x = 6.34428877 + 1.5 x = 6.34428877 + 1.5 Combine like terms: 6.34428877 + 1.5 = 7.84428877 x = 7.84428877 Simplifying x = 7.84428877Subproblem 2
x + -1.5 = -6.34428877 Simplifying x + -1.5 = -6.34428877 Reorder the terms: -1.5 + x = -6.34428877 Solving -1.5 + x = -6.34428877 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.5' to each side of the equation. -1.5 + 1.5 + x = -6.34428877 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + x = -6.34428877 + 1.5 x = -6.34428877 + 1.5 Combine like terms: -6.34428877 + 1.5 = -4.84428877 x = -4.84428877 Simplifying x = -4.84428877Solution
The solution to the problem is based on the solutions from the subproblems. x = {7.84428877, -4.84428877}
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