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Simplifying x2 + -1(x + -2) = 28 Reorder the terms: x2 + -1(-2 + x) = 28 x2 + (-2 * -1 + x * -1) = 28 x2 + (2 + -1x) = 28 Reorder the terms: 2 + -1x + x2 = 28 Solving 2 + -1x + x2 = 28 Solving for variable 'x'. Reorder the terms: 2 + -28 + -1x + x2 = 28 + -28 Combine like terms: 2 + -28 = -26 -26 + -1x + x2 = 28 + -28 Combine like terms: 28 + -28 = 0 -26 + -1x + x2 = 0 Begin completing the square. Move the constant term to the right: Add '26' to each side of the equation. -26 + -1x + 26 + x2 = 0 + 26 Reorder the terms: -26 + 26 + -1x + x2 = 0 + 26 Combine like terms: -26 + 26 = 0 0 + -1x + x2 = 0 + 26 -1x + x2 = 0 + 26 Combine like terms: 0 + 26 = 26 -1x + x2 = 26 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. -1x + 0.25 + x2 = 26 + 0.25 Reorder the terms: 0.25 + -1x + x2 = 26 + 0.25 Combine like terms: 26 + 0.25 = 26.25 0.25 + -1x + x2 = 26.25 Factor a perfect square on the left side: (x + -0.5)(x + -0.5) = 26.25 Calculate the square root of the right side: 5.123475383 Break this problem into two subproblems by setting (x + -0.5) equal to 5.123475383 and -5.123475383.Subproblem 1
x + -0.5 = 5.123475383 Simplifying x + -0.5 = 5.123475383 Reorder the terms: -0.5 + x = 5.123475383 Solving -0.5 + x = 5.123475383 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 = 5.123475383 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + x = 5.123475383 + 0.5 x = 5.123475383 + 0.5 Combine like terms: 5.123475383 + 0.5 = 5.623475383 x = 5.623475383 Simplifying x = 5.623475383Subproblem 2
x + -0.5 = -5.123475383 Simplifying x + -0.5 = -5.123475383 Reorder the terms: -0.5 + x = -5.123475383 Solving -0.5 + x = -5.123475383 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 = -5.123475383 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + x = -5.123475383 + 0.5 x = -5.123475383 + 0.5 Combine like terms: -5.123475383 + 0.5 = -4.623475383 x = -4.623475383 Simplifying x = -4.623475383Solution
The solution to the problem is based on the solutions from the subproblems. x = {5.623475383, -4.623475383}
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