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Simplifying -4x2 + -15x + 15 = -2x + 5 Reorder the terms: 15 + -15x + -4x2 = -2x + 5 Reorder the terms: 15 + -15x + -4x2 = 5 + -2x Solving 15 + -15x + -4x2 = 5 + -2x Solving for variable 'x'. Reorder the terms: 15 + -5 + -15x + 2x + -4x2 = 5 + -2x + -5 + 2x Combine like terms: 15 + -5 = 10 10 + -15x + 2x + -4x2 = 5 + -2x + -5 + 2x Combine like terms: -15x + 2x = -13x 10 + -13x + -4x2 = 5 + -2x + -5 + 2x Reorder the terms: 10 + -13x + -4x2 = 5 + -5 + -2x + 2x Combine like terms: 5 + -5 = 0 10 + -13x + -4x2 = 0 + -2x + 2x 10 + -13x + -4x2 = -2x + 2x Combine like terms: -2x + 2x = 0 10 + -13x + -4x2 = 0 Begin completing the square. Divide all terms by -4 the coefficient of the squared term: Divide each side by '-4'. -2.5 + 3.25x + x2 = 0 Move the constant term to the right: Add '2.5' to each side of the equation. -2.5 + 3.25x + 2.5 + x2 = 0 + 2.5 Reorder the terms: -2.5 + 2.5 + 3.25x + x2 = 0 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + 3.25x + x2 = 0 + 2.5 3.25x + x2 = 0 + 2.5 Combine like terms: 0 + 2.5 = 2.5 3.25x + x2 = 2.5 The x term is 3.25x. Take half its coefficient (1.625). Square it (2.640625) and add it to both sides. Add '2.640625' to each side of the equation. 3.25x + 2.640625 + x2 = 2.5 + 2.640625 Reorder the terms: 2.640625 + 3.25x + x2 = 2.5 + 2.640625 Combine like terms: 2.5 + 2.640625 = 5.140625 2.640625 + 3.25x + x2 = 5.140625 Factor a perfect square on the left side: (x + 1.625)(x + 1.625) = 5.140625 Calculate the square root of the right side: 2.267294643 Break this problem into two subproblems by setting (x + 1.625) equal to 2.267294643 and -2.267294643.Subproblem 1
x + 1.625 = 2.267294643 Simplifying x + 1.625 = 2.267294643 Reorder the terms: 1.625 + x = 2.267294643 Solving 1.625 + x = 2.267294643 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.625' to each side of the equation. 1.625 + -1.625 + x = 2.267294643 + -1.625 Combine like terms: 1.625 + -1.625 = 0.000 0.000 + x = 2.267294643 + -1.625 x = 2.267294643 + -1.625 Combine like terms: 2.267294643 + -1.625 = 0.642294643 x = 0.642294643 Simplifying x = 0.642294643Subproblem 2
x + 1.625 = -2.267294643 Simplifying x + 1.625 = -2.267294643 Reorder the terms: 1.625 + x = -2.267294643 Solving 1.625 + x = -2.267294643 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.625' to each side of the equation. 1.625 + -1.625 + x = -2.267294643 + -1.625 Combine like terms: 1.625 + -1.625 = 0.000 0.000 + x = -2.267294643 + -1.625 x = -2.267294643 + -1.625 Combine like terms: -2.267294643 + -1.625 = -3.892294643 x = -3.892294643 Simplifying x = -3.892294643Solution
The solution to the problem is based on the solutions from the subproblems. x = {0.642294643, -3.892294643}
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