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Simplifying -4x2 + -10x + 5 = 0 Reorder the terms: 5 + -10x + -4x2 = 0 Solving 5 + -10x + -4x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by -4 the coefficient of the squared term: Divide each side by '-4'. -1.25 + 2.5x + x2 = 0 Move the constant term to the right: Add '1.25' to each side of the equation. -1.25 + 2.5x + 1.25 + x2 = 0 + 1.25 Reorder the terms: -1.25 + 1.25 + 2.5x + x2 = 0 + 1.25 Combine like terms: -1.25 + 1.25 = 0.00 0.00 + 2.5x + x2 = 0 + 1.25 2.5x + x2 = 0 + 1.25 Combine like terms: 0 + 1.25 = 1.25 2.5x + x2 = 1.25 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 = 1.25 + 1.5625 Reorder the terms: 1.5625 + 2.5x + x2 = 1.25 + 1.5625 Combine like terms: 1.25 + 1.5625 = 2.8125 1.5625 + 2.5x + x2 = 2.8125 Factor a perfect square on the left side: (x + 1.25)(x + 1.25) = 2.8125 Calculate the square root of the right side: 1.677050983 Break this problem into two subproblems by setting (x + 1.25) equal to 1.677050983 and -1.677050983.Subproblem 1
x + 1.25 = 1.677050983 Simplifying x + 1.25 = 1.677050983 Reorder the terms: 1.25 + x = 1.677050983 Solving 1.25 + x = 1.677050983 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 = 1.677050983 + -1.25 Combine like terms: 1.25 + -1.25 = 0.00 0.00 + x = 1.677050983 + -1.25 x = 1.677050983 + -1.25 Combine like terms: 1.677050983 + -1.25 = 0.427050983 x = 0.427050983 Simplifying x = 0.427050983Subproblem 2
x + 1.25 = -1.677050983 Simplifying x + 1.25 = -1.677050983 Reorder the terms: 1.25 + x = -1.677050983 Solving 1.25 + x = -1.677050983 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 = -1.677050983 + -1.25 Combine like terms: 1.25 + -1.25 = 0.00 0.00 + x = -1.677050983 + -1.25 x = -1.677050983 + -1.25 Combine like terms: -1.677050983 + -1.25 = -2.927050983 x = -2.927050983 Simplifying x = -2.927050983Solution
The solution to the problem is based on the solutions from the subproblems. x = {0.427050983, -2.927050983}
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