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Simplifying 4x2 + -20x + -25 = 10 Reorder the terms: -25 + -20x + 4x2 = 10 Solving -25 + -20x + 4x2 = 10 Solving for variable 'x'. Reorder the terms: -25 + -10 + -20x + 4x2 = 10 + -10 Combine like terms: -25 + -10 = -35 -35 + -20x + 4x2 = 10 + -10 Combine like terms: 10 + -10 = 0 -35 + -20x + 4x2 = 0 Begin completing the square. Divide all terms by 4 the coefficient of the squared term: Divide each side by '4'. -8.75 + -5x + x2 = 0 Move the constant term to the right: Add '8.75' to each side of the equation. -8.75 + -5x + 8.75 + x2 = 0 + 8.75 Reorder the terms: -8.75 + 8.75 + -5x + x2 = 0 + 8.75 Combine like terms: -8.75 + 8.75 = 0.00 0.00 + -5x + x2 = 0 + 8.75 -5x + x2 = 0 + 8.75 Combine like terms: 0 + 8.75 = 8.75 -5x + x2 = 8.75 The x term is -5x. Take half its coefficient (-2.5). Square it (6.25) and add it to both sides. Add '6.25' to each side of the equation. -5x + 6.25 + x2 = 8.75 + 6.25 Reorder the terms: 6.25 + -5x + x2 = 8.75 + 6.25 Combine like terms: 8.75 + 6.25 = 15 6.25 + -5x + x2 = 15 Factor a perfect square on the left side: (x + -2.5)(x + -2.5) = 15 Calculate the square root of the right side: 3.872983346 Break this problem into two subproblems by setting (x + -2.5) equal to 3.872983346 and -3.872983346.Subproblem 1
x + -2.5 = 3.872983346 Simplifying x + -2.5 = 3.872983346 Reorder the terms: -2.5 + x = 3.872983346 Solving -2.5 + x = 3.872983346 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.5' to each side of the equation. -2.5 + 2.5 + x = 3.872983346 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + x = 3.872983346 + 2.5 x = 3.872983346 + 2.5 Combine like terms: 3.872983346 + 2.5 = 6.372983346 x = 6.372983346 Simplifying x = 6.372983346Subproblem 2
x + -2.5 = -3.872983346 Simplifying x + -2.5 = -3.872983346 Reorder the terms: -2.5 + x = -3.872983346 Solving -2.5 + x = -3.872983346 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.5' to each side of the equation. -2.5 + 2.5 + x = -3.872983346 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + x = -3.872983346 + 2.5 x = -3.872983346 + 2.5 Combine like terms: -3.872983346 + 2.5 = -1.372983346 x = -1.372983346 Simplifying x = -1.372983346Solution
The solution to the problem is based on the solutions from the subproblems. x = {6.372983346, -1.372983346}
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