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Simplifying x2 + 18x = 67 Reorder the terms: 18x + x2 = 67 Solving 18x + x2 = 67 Solving for variable 'x'. Reorder the terms: -67 + 18x + x2 = 67 + -67 Combine like terms: 67 + -67 = 0 -67 + 18x + x2 = 0 Begin completing the square. Move the constant term to the right: Add '67' to each side of the equation. -67 + 18x + 67 + x2 = 0 + 67 Reorder the terms: -67 + 67 + 18x + x2 = 0 + 67 Combine like terms: -67 + 67 = 0 0 + 18x + x2 = 0 + 67 18x + x2 = 0 + 67 Combine like terms: 0 + 67 = 67 18x + x2 = 67 The x term is 18x. Take half its coefficient (9). Square it (81) and add it to both sides. Add '81' to each side of the equation. 18x + 81 + x2 = 67 + 81 Reorder the terms: 81 + 18x + x2 = 67 + 81 Combine like terms: 67 + 81 = 148 81 + 18x + x2 = 148 Factor a perfect square on the left side: (x + 9)(x + 9) = 148 Calculate the square root of the right side: 12.165525061 Break this problem into two subproblems by setting (x + 9) equal to 12.165525061 and -12.165525061.Subproblem 1
x + 9 = 12.165525061 Simplifying x + 9 = 12.165525061 Reorder the terms: 9 + x = 12.165525061 Solving 9 + x = 12.165525061 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-9' to each side of the equation. 9 + -9 + x = 12.165525061 + -9 Combine like terms: 9 + -9 = 0 0 + x = 12.165525061 + -9 x = 12.165525061 + -9 Combine like terms: 12.165525061 + -9 = 3.165525061 x = 3.165525061 Simplifying x = 3.165525061Subproblem 2
x + 9 = -12.165525061 Simplifying x + 9 = -12.165525061 Reorder the terms: 9 + x = -12.165525061 Solving 9 + x = -12.165525061 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-9' to each side of the equation. 9 + -9 + x = -12.165525061 + -9 Combine like terms: 9 + -9 = 0 0 + x = -12.165525061 + -9 x = -12.165525061 + -9 Combine like terms: -12.165525061 + -9 = -21.165525061 x = -21.165525061 Simplifying x = -21.165525061Solution
The solution to the problem is based on the solutions from the subproblems. x = {3.165525061, -21.165525061}
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