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Simplifying 4x2 = 9x + -1 Reorder the terms: 4x2 = -1 + 9x Solving 4x2 = -1 + 9x Solving for variable 'x'. Reorder the terms: 1 + -9x + 4x2 = -1 + 9x + 1 + -9x Reorder the terms: 1 + -9x + 4x2 = -1 + 1 + 9x + -9x Combine like terms: -1 + 1 = 0 1 + -9x + 4x2 = 0 + 9x + -9x 1 + -9x + 4x2 = 9x + -9x Combine like terms: 9x + -9x = 0 1 + -9x + 4x2 = 0 Begin completing the square. Divide all terms by 4 the coefficient of the squared term: Divide each side by '4'. 0.25 + -2.25x + x2 = 0 Move the constant term to the right: Add '-0.25' to each side of the equation. 0.25 + -2.25x + -0.25 + x2 = 0 + -0.25 Reorder the terms: 0.25 + -0.25 + -2.25x + x2 = 0 + -0.25 Combine like terms: 0.25 + -0.25 = 0.00 0.00 + -2.25x + x2 = 0 + -0.25 -2.25x + x2 = 0 + -0.25 Combine like terms: 0 + -0.25 = -0.25 -2.25x + x2 = -0.25 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 = -0.25 + 1.265625 Reorder the terms: 1.265625 + -2.25x + x2 = -0.25 + 1.265625 Combine like terms: -0.25 + 1.265625 = 1.015625 1.265625 + -2.25x + x2 = 1.015625 Factor a perfect square on the left side: (x + -1.125)(x + -1.125) = 1.015625 Calculate the square root of the right side: 1.007782219 Break this problem into two subproblems by setting (x + -1.125) equal to 1.007782219 and -1.007782219.Subproblem 1
x + -1.125 = 1.007782219 Simplifying x + -1.125 = 1.007782219 Reorder the terms: -1.125 + x = 1.007782219 Solving -1.125 + x = 1.007782219 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 = 1.007782219 + 1.125 Combine like terms: -1.125 + 1.125 = 0.000 0.000 + x = 1.007782219 + 1.125 x = 1.007782219 + 1.125 Combine like terms: 1.007782219 + 1.125 = 2.132782219 x = 2.132782219 Simplifying x = 2.132782219Subproblem 2
x + -1.125 = -1.007782219 Simplifying x + -1.125 = -1.007782219 Reorder the terms: -1.125 + x = -1.007782219 Solving -1.125 + x = -1.007782219 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 = -1.007782219 + 1.125 Combine like terms: -1.125 + 1.125 = 0.000 0.000 + x = -1.007782219 + 1.125 x = -1.007782219 + 1.125 Combine like terms: -1.007782219 + 1.125 = 0.117217781 x = 0.117217781 Simplifying x = 0.117217781Solution
The solution to the problem is based on the solutions from the subproblems. x = {2.132782219, 0.117217781}
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