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Simplifying 5 + -1(4x2 + 9x) = 0 Reorder the terms: 5 + -1(9x + 4x2) = 0 5 + (9x * -1 + 4x2 * -1) = 0 5 + (-9x + -4x2) = 0 Solving 5 + -9x + -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 + 2.25x + x2 = 0 Move the constant term to the right: Add '1.25' to each side of the equation. -1.25 + 2.25x + 1.25 + x2 = 0 + 1.25 Reorder the terms: -1.25 + 1.25 + 2.25x + x2 = 0 + 1.25 Combine like terms: -1.25 + 1.25 = 0.00 0.00 + 2.25x + x2 = 0 + 1.25 2.25x + x2 = 0 + 1.25 Combine like terms: 0 + 1.25 = 1.25 2.25x + x2 = 1.25 The x term is 2.25x. Take half its coefficient (1.125). Square it (1.265625) and add it to both sides. Add '1.265625' to each side of the equation. 2.25x + 1.265625 + x2 = 1.25 + 1.265625 Reorder the terms: 1.265625 + 2.25x + x2 = 1.25 + 1.265625 Combine like terms: 1.25 + 1.265625 = 2.515625 1.265625 + 2.25x + x2 = 2.515625 Factor a perfect square on the left side: (x + 1.125)(x + 1.125) = 2.515625 Calculate the square root of the right side: 1.586072193 Break this problem into two subproblems by setting (x + 1.125) equal to 1.586072193 and -1.586072193.Subproblem 1
x + 1.125 = 1.586072193 Simplifying x + 1.125 = 1.586072193 Reorder the terms: 1.125 + x = 1.586072193 Solving 1.125 + x = 1.586072193 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.125' to each side of the equation. 1.125 + -1.125 + x = 1.586072193 + -1.125 Combine like terms: 1.125 + -1.125 = 0.000 0.000 + x = 1.586072193 + -1.125 x = 1.586072193 + -1.125 Combine like terms: 1.586072193 + -1.125 = 0.461072193 x = 0.461072193 Simplifying x = 0.461072193Subproblem 2
x + 1.125 = -1.586072193 Simplifying x + 1.125 = -1.586072193 Reorder the terms: 1.125 + x = -1.586072193 Solving 1.125 + x = -1.586072193 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.125' to each side of the equation. 1.125 + -1.125 + x = -1.586072193 + -1.125 Combine like terms: 1.125 + -1.125 = 0.000 0.000 + x = -1.586072193 + -1.125 x = -1.586072193 + -1.125 Combine like terms: -1.586072193 + -1.125 = -2.711072193 x = -2.711072193 Simplifying x = -2.711072193Solution
The solution to the problem is based on the solutions from the subproblems. x = {0.461072193, -2.711072193}
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