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Simplifying 2x2 + 19x + -8.1 = 0 Reorder the terms: -8.1 + 19x + 2x2 = 0 Solving -8.1 + 19x + 2x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by 2 the coefficient of the squared term: Divide each side by '2'. -4.05 + 9.5x + x2 = 0 Move the constant term to the right: Add '4.05' to each side of the equation. -4.05 + 9.5x + 4.05 + x2 = 0 + 4.05 Reorder the terms: -4.05 + 4.05 + 9.5x + x2 = 0 + 4.05 Combine like terms: -4.05 + 4.05 = 0.00 0.00 + 9.5x + x2 = 0 + 4.05 9.5x + x2 = 0 + 4.05 Combine like terms: 0 + 4.05 = 4.05 9.5x + x2 = 4.05 The x term is 9.5x. Take half its coefficient (4.75). Square it (22.5625) and add it to both sides. Add '22.5625' to each side of the equation. 9.5x + 22.5625 + x2 = 4.05 + 22.5625 Reorder the terms: 22.5625 + 9.5x + x2 = 4.05 + 22.5625 Combine like terms: 4.05 + 22.5625 = 26.6125 22.5625 + 9.5x + x2 = 26.6125 Factor a perfect square on the left side: (x + 4.75)(x + 4.75) = 26.6125 Calculate the square root of the right side: 5.158730464 Break this problem into two subproblems by setting (x + 4.75) equal to 5.158730464 and -5.158730464.Subproblem 1
x + 4.75 = 5.158730464 Simplifying x + 4.75 = 5.158730464 Reorder the terms: 4.75 + x = 5.158730464 Solving 4.75 + x = 5.158730464 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4.75' to each side of the equation. 4.75 + -4.75 + x = 5.158730464 + -4.75 Combine like terms: 4.75 + -4.75 = 0.00 0.00 + x = 5.158730464 + -4.75 x = 5.158730464 + -4.75 Combine like terms: 5.158730464 + -4.75 = 0.408730464 x = 0.408730464 Simplifying x = 0.408730464Subproblem 2
x + 4.75 = -5.158730464 Simplifying x + 4.75 = -5.158730464 Reorder the terms: 4.75 + x = -5.158730464 Solving 4.75 + x = -5.158730464 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4.75' to each side of the equation. 4.75 + -4.75 + x = -5.158730464 + -4.75 Combine like terms: 4.75 + -4.75 = 0.00 0.00 + x = -5.158730464 + -4.75 x = -5.158730464 + -4.75 Combine like terms: -5.158730464 + -4.75 = -9.908730464 x = -9.908730464 Simplifying x = -9.908730464Solution
The solution to the problem is based on the solutions from the subproblems. x = {0.408730464, -9.908730464}
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