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Simplifying 8x2 + -9x + -8 = 0 Reorder the terms: -8 + -9x + 8x2 = 0 Solving -8 + -9x + 8x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by 8 the coefficient of the squared term: Divide each side by '8'. -1 + -1.125x + x2 = 0 Move the constant term to the right: Add '1' to each side of the equation. -1 + -1.125x + 1 + x2 = 0 + 1 Reorder the terms: -1 + 1 + -1.125x + x2 = 0 + 1 Combine like terms: -1 + 1 = 0 0 + -1.125x + x2 = 0 + 1 -1.125x + x2 = 0 + 1 Combine like terms: 0 + 1 = 1 -1.125x + x2 = 1 The x term is -1.125x. Take half its coefficient (-0.5625). Square it (0.31640625) and add it to both sides. Add '0.31640625' to each side of the equation. -1.125x + 0.31640625 + x2 = 1 + 0.31640625 Reorder the terms: 0.31640625 + -1.125x + x2 = 1 + 0.31640625 Combine like terms: 1 + 0.31640625 = 1.31640625 0.31640625 + -1.125x + x2 = 1.31640625 Factor a perfect square on the left side: (x + -0.5625)(x + -0.5625) = 1.31640625 Calculate the square root of the right side: 1.147347484 Break this problem into two subproblems by setting (x + -0.5625) equal to 1.147347484 and -1.147347484.Subproblem 1
x + -0.5625 = 1.147347484 Simplifying x + -0.5625 = 1.147347484 Reorder the terms: -0.5625 + x = 1.147347484 Solving -0.5625 + x = 1.147347484 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.5625' to each side of the equation. -0.5625 + 0.5625 + x = 1.147347484 + 0.5625 Combine like terms: -0.5625 + 0.5625 = 0.0000 0.0000 + x = 1.147347484 + 0.5625 x = 1.147347484 + 0.5625 Combine like terms: 1.147347484 + 0.5625 = 1.709847484 x = 1.709847484 Simplifying x = 1.709847484Subproblem 2
x + -0.5625 = -1.147347484 Simplifying x + -0.5625 = -1.147347484 Reorder the terms: -0.5625 + x = -1.147347484 Solving -0.5625 + x = -1.147347484 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.5625' to each side of the equation. -0.5625 + 0.5625 + x = -1.147347484 + 0.5625 Combine like terms: -0.5625 + 0.5625 = 0.0000 0.0000 + x = -1.147347484 + 0.5625 x = -1.147347484 + 0.5625 Combine like terms: -1.147347484 + 0.5625 = -0.584847484 x = -0.584847484 Simplifying x = -0.584847484Solution
The solution to the problem is based on the solutions from the subproblems. x = {1.709847484, -0.584847484}
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