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Simplifying 2x2 + -5x + -6.25 = 0 Reorder the terms: -6.25 + -5x + 2x2 = 0 Solving -6.25 + -5x + 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'. -3.125 + -2.5x + x2 = 0 Move the constant term to the right: Add '3.125' to each side of the equation. -3.125 + -2.5x + 3.125 + x2 = 0 + 3.125 Reorder the terms: -3.125 + 3.125 + -2.5x + x2 = 0 + 3.125 Combine like terms: -3.125 + 3.125 = 0.000 0.000 + -2.5x + x2 = 0 + 3.125 -2.5x + x2 = 0 + 3.125 Combine like terms: 0 + 3.125 = 3.125 -2.5x + x2 = 3.125 The x term is -2.5x. Take half its coefficient (-1.25). Square it (1.5625) and add it to both sides. Add '1.5625' to each side of the equation. -2.5x + 1.5625 + x2 = 3.125 + 1.5625 Reorder the terms: 1.5625 + -2.5x + x2 = 3.125 + 1.5625 Combine like terms: 3.125 + 1.5625 = 4.6875 1.5625 + -2.5x + x2 = 4.6875 Factor a perfect square on the left side: (x + -1.25)(x + -1.25) = 4.6875 Calculate the square root of the right side: 2.165063509 Break this problem into two subproblems by setting (x + -1.25) equal to 2.165063509 and -2.165063509.Subproblem 1
x + -1.25 = 2.165063509 Simplifying x + -1.25 = 2.165063509 Reorder the terms: -1.25 + x = 2.165063509 Solving -1.25 + x = 2.165063509 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.25' to each side of the equation. -1.25 + 1.25 + x = 2.165063509 + 1.25 Combine like terms: -1.25 + 1.25 = 0.00 0.00 + x = 2.165063509 + 1.25 x = 2.165063509 + 1.25 Combine like terms: 2.165063509 + 1.25 = 3.415063509 x = 3.415063509 Simplifying x = 3.415063509Subproblem 2
x + -1.25 = -2.165063509 Simplifying x + -1.25 = -2.165063509 Reorder the terms: -1.25 + x = -2.165063509 Solving -1.25 + x = -2.165063509 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.25' to each side of the equation. -1.25 + 1.25 + x = -2.165063509 + 1.25 Combine like terms: -1.25 + 1.25 = 0.00 0.00 + x = -2.165063509 + 1.25 x = -2.165063509 + 1.25 Combine like terms: -2.165063509 + 1.25 = -0.915063509 x = -0.915063509 Simplifying x = -0.915063509Solution
The solution to the problem is based on the solutions from the subproblems. x = {3.415063509, -0.915063509}
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