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Simplifying -2x2 + -13x = -5 Reorder the terms: -13x + -2x2 = -5 Solving -13x + -2x2 = -5 Solving for variable 'x'. Reorder the terms: 5 + -13x + -2x2 = -5 + 5 Combine like terms: -5 + 5 = 0 5 + -13x + -2x2 = 0 Begin completing the square. Divide all terms by -2 the coefficient of the squared term: Divide each side by '-2'. -2.5 + 6.5x + x2 = 0 Move the constant term to the right: Add '2.5' to each side of the equation. -2.5 + 6.5x + 2.5 + x2 = 0 + 2.5 Reorder the terms: -2.5 + 2.5 + 6.5x + x2 = 0 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + 6.5x + x2 = 0 + 2.5 6.5x + x2 = 0 + 2.5 Combine like terms: 0 + 2.5 = 2.5 6.5x + x2 = 2.5 The x term is 6.5x. Take half its coefficient (3.25). Square it (10.5625) and add it to both sides. Add '10.5625' to each side of the equation. 6.5x + 10.5625 + x2 = 2.5 + 10.5625 Reorder the terms: 10.5625 + 6.5x + x2 = 2.5 + 10.5625 Combine like terms: 2.5 + 10.5625 = 13.0625 10.5625 + 6.5x + x2 = 13.0625 Factor a perfect square on the left side: (x + 3.25)(x + 3.25) = 13.0625 Calculate the square root of the right side: 3.614208074 Break this problem into two subproblems by setting (x + 3.25) equal to 3.614208074 and -3.614208074.Subproblem 1
x + 3.25 = 3.614208074 Simplifying x + 3.25 = 3.614208074 Reorder the terms: 3.25 + x = 3.614208074 Solving 3.25 + x = 3.614208074 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3.25' to each side of the equation. 3.25 + -3.25 + x = 3.614208074 + -3.25 Combine like terms: 3.25 + -3.25 = 0.00 0.00 + x = 3.614208074 + -3.25 x = 3.614208074 + -3.25 Combine like terms: 3.614208074 + -3.25 = 0.364208074 x = 0.364208074 Simplifying x = 0.364208074Subproblem 2
x + 3.25 = -3.614208074 Simplifying x + 3.25 = -3.614208074 Reorder the terms: 3.25 + x = -3.614208074 Solving 3.25 + x = -3.614208074 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3.25' to each side of the equation. 3.25 + -3.25 + x = -3.614208074 + -3.25 Combine like terms: 3.25 + -3.25 = 0.00 0.00 + x = -3.614208074 + -3.25 x = -3.614208074 + -3.25 Combine like terms: -3.614208074 + -3.25 = -6.864208074 x = -6.864208074 Simplifying x = -6.864208074Solution
The solution to the problem is based on the solutions from the subproblems. x = {0.364208074, -6.864208074}
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