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Simplifying 2x2 + -5x + -12.51 = 0 Reorder the terms: -12.51 + -5x + 2x2 = 0 Solving -12.51 + -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'. -6.255 + -2.5x + x2 = 0 Move the constant term to the right: Add '6.255' to each side of the equation. -6.255 + -2.5x + 6.255 + x2 = 0 + 6.255 Reorder the terms: -6.255 + 6.255 + -2.5x + x2 = 0 + 6.255 Combine like terms: -6.255 + 6.255 = 0.000 0.000 + -2.5x + x2 = 0 + 6.255 -2.5x + x2 = 0 + 6.255 Combine like terms: 0 + 6.255 = 6.255 -2.5x + x2 = 6.255 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 = 6.255 + 1.5625 Reorder the terms: 1.5625 + -2.5x + x2 = 6.255 + 1.5625 Combine like terms: 6.255 + 1.5625 = 7.8175 1.5625 + -2.5x + x2 = 7.8175 Factor a perfect square on the left side: (x + -1.25)(x + -1.25) = 7.8175 Calculate the square root of the right side: 2.795979256 Break this problem into two subproblems by setting (x + -1.25) equal to 2.795979256 and -2.795979256.Subproblem 1
x + -1.25 = 2.795979256 Simplifying x + -1.25 = 2.795979256 Reorder the terms: -1.25 + x = 2.795979256 Solving -1.25 + x = 2.795979256 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 = 2.795979256 + 1.25 Combine like terms: -1.25 + 1.25 = 0.00 0.00 + x = 2.795979256 + 1.25 x = 2.795979256 + 1.25 Combine like terms: 2.795979256 + 1.25 = 4.045979256 x = 4.045979256 Simplifying x = 4.045979256Subproblem 2
x + -1.25 = -2.795979256 Simplifying x + -1.25 = -2.795979256 Reorder the terms: -1.25 + x = -2.795979256 Solving -1.25 + x = -2.795979256 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 = -2.795979256 + 1.25 Combine like terms: -1.25 + 1.25 = 0.00 0.00 + x = -2.795979256 + 1.25 x = -2.795979256 + 1.25 Combine like terms: -2.795979256 + 1.25 = -1.545979256 x = -1.545979256 Simplifying x = -1.545979256Solution
The solution to the problem is based on the solutions from the subproblems. x = {4.045979256, -1.545979256}
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