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Simplifying 9x2 + 18x + -39 = 0 Reorder the terms: -39 + 18x + 9x2 = 0 Solving -39 + 18x + 9x2 = 0 Solving for variable 'x'. Factor out the Greatest Common Factor (GCF), '3'. 3(-13 + 6x + 3x2) = 0 Ignore the factor 3.Subproblem 1
Set the factor '(-13 + 6x + 3x2)' equal to zero and attempt to solve: Simplifying -13 + 6x + 3x2 = 0 Solving -13 + 6x + 3x2 = 0 Begin completing the square. Divide all terms by 3 the coefficient of the squared term: Divide each side by '3'. -4.333333333 + 2x + x2 = 0 Move the constant term to the right: Add '4.333333333' to each side of the equation. -4.333333333 + 2x + 4.333333333 + x2 = 0 + 4.333333333 Reorder the terms: -4.333333333 + 4.333333333 + 2x + x2 = 0 + 4.333333333 Combine like terms: -4.333333333 + 4.333333333 = 0.000000000 0.000000000 + 2x + x2 = 0 + 4.333333333 2x + x2 = 0 + 4.333333333 Combine like terms: 0 + 4.333333333 = 4.333333333 2x + x2 = 4.333333333 The x term is 2x. Take half its coefficient (1). Square it (1) and add it to both sides. Add '1' to each side of the equation. 2x + 1 + x2 = 4.333333333 + 1 Reorder the terms: 1 + 2x + x2 = 4.333333333 + 1 Combine like terms: 4.333333333 + 1 = 5.333333333 1 + 2x + x2 = 5.333333333 Factor a perfect square on the left side: (x + 1)(x + 1) = 5.333333333 Calculate the square root of the right side: 2.309401077 Break this problem into two subproblems by setting (x + 1) equal to 2.309401077 and -2.309401077.Subproblem 1
x + 1 = 2.309401077 Simplifying x + 1 = 2.309401077 Reorder the terms: 1 + x = 2.309401077 Solving 1 + x = 2.309401077 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + x = 2.309401077 + -1 Combine like terms: 1 + -1 = 0 0 + x = 2.309401077 + -1 x = 2.309401077 + -1 Combine like terms: 2.309401077 + -1 = 1.309401077 x = 1.309401077 Simplifying x = 1.309401077Subproblem 2
x + 1 = -2.309401077 Simplifying x + 1 = -2.309401077 Reorder the terms: 1 + x = -2.309401077 Solving 1 + x = -2.309401077 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + x = -2.309401077 + -1 Combine like terms: 1 + -1 = 0 0 + x = -2.309401077 + -1 x = -2.309401077 + -1 Combine like terms: -2.309401077 + -1 = -3.309401077 x = -3.309401077 Simplifying x = -3.309401077Solution
The solution to the problem is based on the solutions from the subproblems. x = {1.309401077, -3.309401077}Solution
x = {1.309401077, -3.309401077}
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