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Simplifying (x + -1)(x + 2) = 15 Reorder the terms: (-1 + x)(x + 2) = 15 Reorder the terms: (-1 + x)(2 + x) = 15 Multiply (-1 + x) * (2 + x) (-1(2 + x) + x(2 + x)) = 15 ((2 * -1 + x * -1) + x(2 + x)) = 15 ((-2 + -1x) + x(2 + x)) = 15 (-2 + -1x + (2 * x + x * x)) = 15 (-2 + -1x + (2x + x2)) = 15 Combine like terms: -1x + 2x = 1x (-2 + 1x + x2) = 15 Solving -2 + 1x + x2 = 15 Solving for variable 'x'. Reorder the terms: -2 + -15 + 1x + x2 = 15 + -15 Combine like terms: -2 + -15 = -17 -17 + 1x + x2 = 15 + -15 Combine like terms: 15 + -15 = 0 -17 + 1x + x2 = 0 Begin completing the square. Move the constant term to the right: Add '17' to each side of the equation. -17 + 1x + 17 + x2 = 0 + 17 Reorder the terms: -17 + 17 + 1x + x2 = 0 + 17 Combine like terms: -17 + 17 = 0 0 + 1x + x2 = 0 + 17 1x + x2 = 0 + 17 Combine like terms: 0 + 17 = 17 1x + x2 = 17 The x term is 1x. Take half its coefficient (0.5). Square it (0.25) and add it to both sides. Add '0.25' to each side of the equation. x + 0.25 + x2 = 17 + 0.25 Reorder the terms: 0.25 + x + x2 = 17 + 0.25 Combine like terms: 17 + 0.25 = 17.25 0.25 + x + x2 = 17.25 Factor a perfect square on the left side: (x + 0.5)(x + 0.5) = 17.25 Calculate the square root of the right side: 4.153311931 Break this problem into two subproblems by setting (x + 0.5) equal to 4.153311931 and -4.153311931.Subproblem 1
x + 0.5 = 4.153311931 Simplifying x + 0.5 = 4.153311931 Reorder the terms: 0.5 + x = 4.153311931 Solving 0.5 + x = 4.153311931 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = 4.153311931 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = 4.153311931 + -0.5 x = 4.153311931 + -0.5 Combine like terms: 4.153311931 + -0.5 = 3.653311931 x = 3.653311931 Simplifying x = 3.653311931Subproblem 2
x + 0.5 = -4.153311931 Simplifying x + 0.5 = -4.153311931 Reorder the terms: 0.5 + x = -4.153311931 Solving 0.5 + x = -4.153311931 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = -4.153311931 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = -4.153311931 + -0.5 x = -4.153311931 + -0.5 Combine like terms: -4.153311931 + -0.5 = -4.653311931 x = -4.653311931 Simplifying x = -4.653311931Solution
The solution to the problem is based on the solutions from the subproblems. x = {3.653311931, -4.653311931}
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