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Simplifying -9 = 6x2 + -18x Reorder the terms: -9 = -18x + 6x2 Solving -9 = -18x + 6x2 Solving for variable 'x'. Reorder the terms: -9 + 18x + -6x2 = -18x + 18x + 6x2 + -6x2 Combine like terms: -18x + 18x = 0 -9 + 18x + -6x2 = 0 + 6x2 + -6x2 -9 + 18x + -6x2 = 6x2 + -6x2 Combine like terms: 6x2 + -6x2 = 0 -9 + 18x + -6x2 = 0 Factor out the Greatest Common Factor (GCF), '3'. 3(-3 + 6x + -2x2) = 0 Ignore the factor 3.Subproblem 1
Set the factor '(-3 + 6x + -2x2)' equal to zero and attempt to solve: Simplifying -3 + 6x + -2x2 = 0 Solving -3 + 6x + -2x2 = 0 Begin completing the square. Divide all terms by -2 the coefficient of the squared term: Divide each side by '-2'. 1.5 + -3x + x2 = 0 Move the constant term to the right: Add '-1.5' to each side of the equation. 1.5 + -3x + -1.5 + x2 = 0 + -1.5 Reorder the terms: 1.5 + -1.5 + -3x + x2 = 0 + -1.5 Combine like terms: 1.5 + -1.5 = 0.0 0.0 + -3x + x2 = 0 + -1.5 -3x + x2 = 0 + -1.5 Combine like terms: 0 + -1.5 = -1.5 -3x + x2 = -1.5 The x term is -3x. Take half its coefficient (-1.5). Square it (2.25) and add it to both sides. Add '2.25' to each side of the equation. -3x + 2.25 + x2 = -1.5 + 2.25 Reorder the terms: 2.25 + -3x + x2 = -1.5 + 2.25 Combine like terms: -1.5 + 2.25 = 0.75 2.25 + -3x + x2 = 0.75 Factor a perfect square on the left side: (x + -1.5)(x + -1.5) = 0.75 Calculate the square root of the right side: 0.866025404 Break this problem into two subproblems by setting (x + -1.5) equal to 0.866025404 and -0.866025404.Subproblem 1
x + -1.5 = 0.866025404 Simplifying x + -1.5 = 0.866025404 Reorder the terms: -1.5 + x = 0.866025404 Solving -1.5 + x = 0.866025404 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.5' to each side of the equation. -1.5 + 1.5 + x = 0.866025404 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + x = 0.866025404 + 1.5 x = 0.866025404 + 1.5 Combine like terms: 0.866025404 + 1.5 = 2.366025404 x = 2.366025404 Simplifying x = 2.366025404Subproblem 2
x + -1.5 = -0.866025404 Simplifying x + -1.5 = -0.866025404 Reorder the terms: -1.5 + x = -0.866025404 Solving -1.5 + x = -0.866025404 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.5' to each side of the equation. -1.5 + 1.5 + x = -0.866025404 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + x = -0.866025404 + 1.5 x = -0.866025404 + 1.5 Combine like terms: -0.866025404 + 1.5 = 0.633974596 x = 0.633974596 Simplifying x = 0.633974596Solution
The solution to the problem is based on the solutions from the subproblems. x = {2.366025404, 0.633974596}Solution
x = {2.366025404, 0.633974596}
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