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Simplifying 4x2 + -36x + 51 = 0 Reorder the terms: 51 + -36x + 4x2 = 0 Solving 51 + -36x + 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'. 12.75 + -9x + x2 = 0 Move the constant term to the right: Add '-12.75' to each side of the equation. 12.75 + -9x + -12.75 + x2 = 0 + -12.75 Reorder the terms: 12.75 + -12.75 + -9x + x2 = 0 + -12.75 Combine like terms: 12.75 + -12.75 = 0.00 0.00 + -9x + x2 = 0 + -12.75 -9x + x2 = 0 + -12.75 Combine like terms: 0 + -12.75 = -12.75 -9x + x2 = -12.75 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 = -12.75 + 20.25 Reorder the terms: 20.25 + -9x + x2 = -12.75 + 20.25 Combine like terms: -12.75 + 20.25 = 7.5 20.25 + -9x + x2 = 7.5 Factor a perfect square on the left side: (x + -4.5)(x + -4.5) = 7.5 Calculate the square root of the right side: 2.738612788 Break this problem into two subproblems by setting (x + -4.5) equal to 2.738612788 and -2.738612788.Subproblem 1
x + -4.5 = 2.738612788 Simplifying x + -4.5 = 2.738612788 Reorder the terms: -4.5 + x = 2.738612788 Solving -4.5 + x = 2.738612788 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 = 2.738612788 + 4.5 Combine like terms: -4.5 + 4.5 = 0.0 0.0 + x = 2.738612788 + 4.5 x = 2.738612788 + 4.5 Combine like terms: 2.738612788 + 4.5 = 7.238612788 x = 7.238612788 Simplifying x = 7.238612788Subproblem 2
x + -4.5 = -2.738612788 Simplifying x + -4.5 = -2.738612788 Reorder the terms: -4.5 + x = -2.738612788 Solving -4.5 + x = -2.738612788 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 = -2.738612788 + 4.5 Combine like terms: -4.5 + 4.5 = 0.0 0.0 + x = -2.738612788 + 4.5 x = -2.738612788 + 4.5 Combine like terms: -2.738612788 + 4.5 = 1.761387212 x = 1.761387212 Simplifying x = 1.761387212Solution
The solution to the problem is based on the solutions from the subproblems. x = {7.238612788, 1.761387212}
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