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Simplifying -2x2 + -12x + -9 = 0 Reorder the terms: -9 + -12x + -2x2 = 0 Solving -9 + -12x + -2x2 = 0 Solving for variable 'x'. Factor out the Greatest Common Factor (GCF), '-1'. -1(9 + 12x + 2x2) = 0 Ignore the factor -1.Subproblem 1
Set the factor '(9 + 12x + 2x2)' equal to zero and attempt to solve: Simplifying 9 + 12x + 2x2 = 0 Solving 9 + 12x + 2x2 = 0 Begin completing the square. Divide all terms by 2 the coefficient of the squared term: Divide each side by '2'. 4.5 + 6x + x2 = 0 Move the constant term to the right: Add '-4.5' to each side of the equation. 4.5 + 6x + -4.5 + x2 = 0 + -4.5 Reorder the terms: 4.5 + -4.5 + 6x + x2 = 0 + -4.5 Combine like terms: 4.5 + -4.5 = 0.0 0.0 + 6x + x2 = 0 + -4.5 6x + x2 = 0 + -4.5 Combine like terms: 0 + -4.5 = -4.5 6x + x2 = -4.5 The x term is 6x. Take half its coefficient (3). Square it (9) and add it to both sides. Add '9' to each side of the equation. 6x + 9 + x2 = -4.5 + 9 Reorder the terms: 9 + 6x + x2 = -4.5 + 9 Combine like terms: -4.5 + 9 = 4.5 9 + 6x + x2 = 4.5 Factor a perfect square on the left side: (x + 3)(x + 3) = 4.5 Calculate the square root of the right side: 2.121320344 Break this problem into two subproblems by setting (x + 3) equal to 2.121320344 and -2.121320344.Subproblem 1
x + 3 = 2.121320344 Simplifying x + 3 = 2.121320344 Reorder the terms: 3 + x = 2.121320344 Solving 3 + x = 2.121320344 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + x = 2.121320344 + -3 Combine like terms: 3 + -3 = 0 0 + x = 2.121320344 + -3 x = 2.121320344 + -3 Combine like terms: 2.121320344 + -3 = -0.878679656 x = -0.878679656 Simplifying x = -0.878679656Subproblem 2
x + 3 = -2.121320344 Simplifying x + 3 = -2.121320344 Reorder the terms: 3 + x = -2.121320344 Solving 3 + x = -2.121320344 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + x = -2.121320344 + -3 Combine like terms: 3 + -3 = 0 0 + x = -2.121320344 + -3 x = -2.121320344 + -3 Combine like terms: -2.121320344 + -3 = -5.121320344 x = -5.121320344 Simplifying x = -5.121320344Solution
The solution to the problem is based on the solutions from the subproblems. x = {-0.878679656, -5.121320344}Solution
x = {-0.878679656, -5.121320344}
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