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Simplifying x2 + -13x + 15 = 0 Reorder the terms: 15 + -13x + x2 = 0 Solving 15 + -13x + x2 = 0 Solving for variable 'x'. Begin completing the square. Move the constant term to the right: Add '-15' to each side of the equation. 15 + -13x + -15 + x2 = 0 + -15 Reorder the terms: 15 + -15 + -13x + x2 = 0 + -15 Combine like terms: 15 + -15 = 0 0 + -13x + x2 = 0 + -15 -13x + x2 = 0 + -15 Combine like terms: 0 + -15 = -15 -13x + x2 = -15 The x term is -13x. Take half its coefficient (-6.5). Square it (42.25) and add it to both sides. Add '42.25' to each side of the equation. -13x + 42.25 + x2 = -15 + 42.25 Reorder the terms: 42.25 + -13x + x2 = -15 + 42.25 Combine like terms: -15 + 42.25 = 27.25 42.25 + -13x + x2 = 27.25 Factor a perfect square on the left side: (x + -6.5)(x + -6.5) = 27.25 Calculate the square root of the right side: 5.220153254 Break this problem into two subproblems by setting (x + -6.5) equal to 5.220153254 and -5.220153254.Subproblem 1
x + -6.5 = 5.220153254 Simplifying x + -6.5 = 5.220153254 Reorder the terms: -6.5 + x = 5.220153254 Solving -6.5 + x = 5.220153254 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '6.5' to each side of the equation. -6.5 + 6.5 + x = 5.220153254 + 6.5 Combine like terms: -6.5 + 6.5 = 0.0 0.0 + x = 5.220153254 + 6.5 x = 5.220153254 + 6.5 Combine like terms: 5.220153254 + 6.5 = 11.720153254 x = 11.720153254 Simplifying x = 11.720153254Subproblem 2
x + -6.5 = -5.220153254 Simplifying x + -6.5 = -5.220153254 Reorder the terms: -6.5 + x = -5.220153254 Solving -6.5 + x = -5.220153254 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '6.5' to each side of the equation. -6.5 + 6.5 + x = -5.220153254 + 6.5 Combine like terms: -6.5 + 6.5 = 0.0 0.0 + x = -5.220153254 + 6.5 x = -5.220153254 + 6.5 Combine like terms: -5.220153254 + 6.5 = 1.279846746 x = 1.279846746 Simplifying x = 1.279846746Solution
The solution to the problem is based on the solutions from the subproblems. x = {11.720153254, 1.279846746}
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