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Simplifying x2 + 18x + -61 = 4 Reorder the terms: -61 + 18x + x2 = 4 Solving -61 + 18x + x2 = 4 Solving for variable 'x'. Reorder the terms: -61 + -4 + 18x + x2 = 4 + -4 Combine like terms: -61 + -4 = -65 -65 + 18x + x2 = 4 + -4 Combine like terms: 4 + -4 = 0 -65 + 18x + x2 = 0 Begin completing the square. Move the constant term to the right: Add '65' to each side of the equation. -65 + 18x + 65 + x2 = 0 + 65 Reorder the terms: -65 + 65 + 18x + x2 = 0 + 65 Combine like terms: -65 + 65 = 0 0 + 18x + x2 = 0 + 65 18x + x2 = 0 + 65 Combine like terms: 0 + 65 = 65 18x + x2 = 65 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 = 65 + 81 Reorder the terms: 81 + 18x + x2 = 65 + 81 Combine like terms: 65 + 81 = 146 81 + 18x + x2 = 146 Factor a perfect square on the left side: (x + 9)(x + 9) = 146 Calculate the square root of the right side: 12.083045974 Break this problem into two subproblems by setting (x + 9) equal to 12.083045974 and -12.083045974.Subproblem 1
x + 9 = 12.083045974 Simplifying x + 9 = 12.083045974 Reorder the terms: 9 + x = 12.083045974 Solving 9 + x = 12.083045974 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 = 12.083045974 + -9 Combine like terms: 9 + -9 = 0 0 + x = 12.083045974 + -9 x = 12.083045974 + -9 Combine like terms: 12.083045974 + -9 = 3.083045974 x = 3.083045974 Simplifying x = 3.083045974Subproblem 2
x + 9 = -12.083045974 Simplifying x + 9 = -12.083045974 Reorder the terms: 9 + x = -12.083045974 Solving 9 + x = -12.083045974 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 = -12.083045974 + -9 Combine like terms: 9 + -9 = 0 0 + x = -12.083045974 + -9 x = -12.083045974 + -9 Combine like terms: -12.083045974 + -9 = -21.083045974 x = -21.083045974 Simplifying x = -21.083045974Solution
The solution to the problem is based on the solutions from the subproblems. x = {3.083045974, -21.083045974}
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