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Simplifying 2x(x + -4) = x + x2 + -12 Reorder the terms: 2x(-4 + x) = x + x2 + -12 (-4 * 2x + x * 2x) = x + x2 + -12 (-8x + 2x2) = x + x2 + -12 Reorder the terms: -8x + 2x2 = -12 + x + x2 Solving -8x + 2x2 = -12 + x + x2 Solving for variable 'x'. Reorder the terms: 12 + -8x + -1x + 2x2 + -1x2 = -12 + x + x2 + 12 + -1x + -1x2 Combine like terms: -8x + -1x = -9x 12 + -9x + 2x2 + -1x2 = -12 + x + x2 + 12 + -1x + -1x2 Combine like terms: 2x2 + -1x2 = 1x2 12 + -9x + 1x2 = -12 + x + x2 + 12 + -1x + -1x2 Reorder the terms: 12 + -9x + 1x2 = -12 + 12 + x + -1x + x2 + -1x2 Combine like terms: -12 + 12 = 0 12 + -9x + 1x2 = 0 + x + -1x + x2 + -1x2 12 + -9x + 1x2 = x + -1x + x2 + -1x2 Combine like terms: x + -1x = 0 12 + -9x + 1x2 = 0 + x2 + -1x2 12 + -9x + 1x2 = x2 + -1x2 Combine like terms: x2 + -1x2 = 0 12 + -9x + 1x2 = 0 Begin completing the square. Move the constant term to the right: Add '-12' to each side of the equation. 12 + -9x + -12 + x2 = 0 + -12 Reorder the terms: 12 + -12 + -9x + x2 = 0 + -12 Combine like terms: 12 + -12 = 0 0 + -9x + x2 = 0 + -12 -9x + x2 = 0 + -12 Combine like terms: 0 + -12 = -12 -9x + x2 = -12 The x term is -9x. Take half its coefficient (-4.5). Square it (20.25) and add it to both sides. Add '20.25' to each side of the equation. -9x + 20.25 + x2 = -12 + 20.25 Reorder the terms: 20.25 + -9x + x2 = -12 + 20.25 Combine like terms: -12 + 20.25 = 8.25 20.25 + -9x + x2 = 8.25 Factor a perfect square on the left side: (x + -4.5)(x + -4.5) = 8.25 Calculate the square root of the right side: 2.872281323 Break this problem into two subproblems by setting (x + -4.5) equal to 2.872281323 and -2.872281323.Subproblem 1
x + -4.5 = 2.872281323 Simplifying x + -4.5 = 2.872281323 Reorder the terms: -4.5 + x = 2.872281323 Solving -4.5 + x = 2.872281323 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4.5' to each side of the equation. -4.5 + 4.5 + x = 2.872281323 + 4.5 Combine like terms: -4.5 + 4.5 = 0.0 0.0 + x = 2.872281323 + 4.5 x = 2.872281323 + 4.5 Combine like terms: 2.872281323 + 4.5 = 7.372281323 x = 7.372281323 Simplifying x = 7.372281323Subproblem 2
x + -4.5 = -2.872281323 Simplifying x + -4.5 = -2.872281323 Reorder the terms: -4.5 + x = -2.872281323 Solving -4.5 + x = -2.872281323 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4.5' to each side of the equation. -4.5 + 4.5 + x = -2.872281323 + 4.5 Combine like terms: -4.5 + 4.5 = 0.0 0.0 + x = -2.872281323 + 4.5 x = -2.872281323 + 4.5 Combine like terms: -2.872281323 + 4.5 = 1.627718677 x = 1.627718677 Simplifying x = 1.627718677Solution
The solution to the problem is based on the solutions from the subproblems. x = {7.372281323, 1.627718677}
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