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Simplifying 4x(25 + -4x) = 25 (25 * 4x + -4x * 4x) = 25 (100x + -16x2) = 25 Solving 100x + -16x2 = 25 Solving for variable 'x'. Reorder the terms: -25 + 100x + -16x2 = 25 + -25 Combine like terms: 25 + -25 = 0 -25 + 100x + -16x2 = 0 Begin completing the square. Divide all terms by -16 the coefficient of the squared term: Divide each side by '-16'. 1.5625 + -6.25x + x2 = 0 Move the constant term to the right: Add '-1.5625' to each side of the equation. 1.5625 + -6.25x + -1.5625 + x2 = 0 + -1.5625 Reorder the terms: 1.5625 + -1.5625 + -6.25x + x2 = 0 + -1.5625 Combine like terms: 1.5625 + -1.5625 = 0.0000 0.0000 + -6.25x + x2 = 0 + -1.5625 -6.25x + x2 = 0 + -1.5625 Combine like terms: 0 + -1.5625 = -1.5625 -6.25x + x2 = -1.5625 The x term is -6.25x. Take half its coefficient (-3.125). Square it (9.765625) and add it to both sides. Add '9.765625' to each side of the equation. -6.25x + 9.765625 + x2 = -1.5625 + 9.765625 Reorder the terms: 9.765625 + -6.25x + x2 = -1.5625 + 9.765625 Combine like terms: -1.5625 + 9.765625 = 8.203125 9.765625 + -6.25x + x2 = 8.203125 Factor a perfect square on the left side: (x + -3.125)(x + -3.125) = 8.203125 Calculate the square root of the right side: 2.864109809 Break this problem into two subproblems by setting (x + -3.125) equal to 2.864109809 and -2.864109809.Subproblem 1
x + -3.125 = 2.864109809 Simplifying x + -3.125 = 2.864109809 Reorder the terms: -3.125 + x = 2.864109809 Solving -3.125 + x = 2.864109809 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.125' to each side of the equation. -3.125 + 3.125 + x = 2.864109809 + 3.125 Combine like terms: -3.125 + 3.125 = 0.000 0.000 + x = 2.864109809 + 3.125 x = 2.864109809 + 3.125 Combine like terms: 2.864109809 + 3.125 = 5.989109809 x = 5.989109809 Simplifying x = 5.989109809Subproblem 2
x + -3.125 = -2.864109809 Simplifying x + -3.125 = -2.864109809 Reorder the terms: -3.125 + x = -2.864109809 Solving -3.125 + x = -2.864109809 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.125' to each side of the equation. -3.125 + 3.125 + x = -2.864109809 + 3.125 Combine like terms: -3.125 + 3.125 = 0.000 0.000 + x = -2.864109809 + 3.125 x = -2.864109809 + 3.125 Combine like terms: -2.864109809 + 3.125 = 0.260890191 x = 0.260890191 Simplifying x = 0.260890191Solution
The solution to the problem is based on the solutions from the subproblems. x = {5.989109809, 0.260890191}
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