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Simplifying 8.85 = -0.5x2 + 1.5x + 9 Reorder the terms: 8.85 = 9 + 1.5x + -0.5x2 Solving 8.85 = 9 + 1.5x + -0.5x2 Solving for variable 'x'. Combine like terms: 8.85 + -9 = -0.15 -0.15 + -1.5x + 0.5x2 = 9 + 1.5x + -0.5x2 + -9 + -1.5x + 0.5x2 Reorder the terms: -0.15 + -1.5x + 0.5x2 = 9 + -9 + 1.5x + -1.5x + -0.5x2 + 0.5x2 Combine like terms: 9 + -9 = 0 -0.15 + -1.5x + 0.5x2 = 0 + 1.5x + -1.5x + -0.5x2 + 0.5x2 -0.15 + -1.5x + 0.5x2 = 1.5x + -1.5x + -0.5x2 + 0.5x2 Combine like terms: 1.5x + -1.5x = 0.0 -0.15 + -1.5x + 0.5x2 = 0.0 + -0.5x2 + 0.5x2 -0.15 + -1.5x + 0.5x2 = -0.5x2 + 0.5x2 Combine like terms: -0.5x2 + 0.5x2 = 0.0 -0.15 + -1.5x + 0.5x2 = 0.0 Begin completing the square. Divide all terms by 0.5 the coefficient of the squared term: Divide each side by '0.5'. -0.3 + -3x + x2 = 0 Move the constant term to the right: Add '0.3' to each side of the equation. -0.3 + -3x + 0.3 + x2 = 0 + 0.3 Reorder the terms: -0.3 + 0.3 + -3x + x2 = 0 + 0.3 Combine like terms: -0.3 + 0.3 = 0.0 0.0 + -3x + x2 = 0 + 0.3 -3x + x2 = 0 + 0.3 Combine like terms: 0 + 0.3 = 0.3 -3x + x2 = 0.3 The x term is -3x. Take half its coefficient (-1.5). Square it (2.25) and add it to both sides. Add '2.25' to each side of the equation. -3x + 2.25 + x2 = 0.3 + 2.25 Reorder the terms: 2.25 + -3x + x2 = 0.3 + 2.25 Combine like terms: 0.3 + 2.25 = 2.55 2.25 + -3x + x2 = 2.55 Factor a perfect square on the left side: (x + -1.5)(x + -1.5) = 2.55 Calculate the square root of the right side: 1.596871942 Break this problem into two subproblems by setting (x + -1.5) equal to 1.596871942 and -1.596871942.Subproblem 1
x + -1.5 = 1.596871942 Simplifying x + -1.5 = 1.596871942 Reorder the terms: -1.5 + x = 1.596871942 Solving -1.5 + x = 1.596871942 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.5' to each side of the equation. -1.5 + 1.5 + x = 1.596871942 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + x = 1.596871942 + 1.5 x = 1.596871942 + 1.5 Combine like terms: 1.596871942 + 1.5 = 3.096871942 x = 3.096871942 Simplifying x = 3.096871942Subproblem 2
x + -1.5 = -1.596871942 Simplifying x + -1.5 = -1.596871942 Reorder the terms: -1.5 + x = -1.596871942 Solving -1.5 + x = -1.596871942 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.5' to each side of the equation. -1.5 + 1.5 + x = -1.596871942 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + x = -1.596871942 + 1.5 x = -1.596871942 + 1.5 Combine like terms: -1.596871942 + 1.5 = -0.096871942 x = -0.096871942 Simplifying x = -0.096871942Solution
The solution to the problem is based on the solutions from the subproblems. x = {3.096871942, -0.096871942}
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