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Simplifying -3x(x + 3) = 5x + 6 Reorder the terms: -3x(3 + x) = 5x + 6 (3 * -3x + x * -3x) = 5x + 6 (-9x + -3x2) = 5x + 6 Reorder the terms: -9x + -3x2 = 6 + 5x Solving -9x + -3x2 = 6 + 5x Solving for variable 'x'. Reorder the terms: -6 + -9x + -5x + -3x2 = 6 + 5x + -6 + -5x Combine like terms: -9x + -5x = -14x -6 + -14x + -3x2 = 6 + 5x + -6 + -5x Reorder the terms: -6 + -14x + -3x2 = 6 + -6 + 5x + -5x Combine like terms: 6 + -6 = 0 -6 + -14x + -3x2 = 0 + 5x + -5x -6 + -14x + -3x2 = 5x + -5x Combine like terms: 5x + -5x = 0 -6 + -14x + -3x2 = 0 Factor out the Greatest Common Factor (GCF), '-1'. -1(6 + 14x + 3x2) = 0 Ignore the factor -1.Subproblem 1
Set the factor '(6 + 14x + 3x2)' equal to zero and attempt to solve: Simplifying 6 + 14x + 3x2 = 0 Solving 6 + 14x + 3x2 = 0 Begin completing the square. Divide all terms by 3 the coefficient of the squared term: Divide each side by '3'. 2 + 4.666666667x + x2 = 0 Move the constant term to the right: Add '-2' to each side of the equation. 2 + 4.666666667x + -2 + x2 = 0 + -2 Reorder the terms: 2 + -2 + 4.666666667x + x2 = 0 + -2 Combine like terms: 2 + -2 = 0 0 + 4.666666667x + x2 = 0 + -2 4.666666667x + x2 = 0 + -2 Combine like terms: 0 + -2 = -2 4.666666667x + x2 = -2 The x term is 4.666666667x. Take half its coefficient (2.333333334). Square it (5.444444448) and add it to both sides. Add '5.444444448' to each side of the equation. 4.666666667x + 5.444444448 + x2 = -2 + 5.444444448 Reorder the terms: 5.444444448 + 4.666666667x + x2 = -2 + 5.444444448 Combine like terms: -2 + 5.444444448 = 3.444444448 5.444444448 + 4.666666667x + x2 = 3.444444448 Factor a perfect square on the left side: (x + 2.333333334)(x + 2.333333334) = 3.444444448 Calculate the square root of the right side: 1.855921455 Break this problem into two subproblems by setting (x + 2.333333334) equal to 1.855921455 and -1.855921455.Subproblem 1
x + 2.333333334 = 1.855921455 Simplifying x + 2.333333334 = 1.855921455 Reorder the terms: 2.333333334 + x = 1.855921455 Solving 2.333333334 + x = 1.855921455 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.333333334' to each side of the equation. 2.333333334 + -2.333333334 + x = 1.855921455 + -2.333333334 Combine like terms: 2.333333334 + -2.333333334 = 0.000000000 0.000000000 + x = 1.855921455 + -2.333333334 x = 1.855921455 + -2.333333334 Combine like terms: 1.855921455 + -2.333333334 = -0.477411879 x = -0.477411879 Simplifying x = -0.477411879Subproblem 2
x + 2.333333334 = -1.855921455 Simplifying x + 2.333333334 = -1.855921455 Reorder the terms: 2.333333334 + x = -1.855921455 Solving 2.333333334 + x = -1.855921455 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.333333334' to each side of the equation. 2.333333334 + -2.333333334 + x = -1.855921455 + -2.333333334 Combine like terms: 2.333333334 + -2.333333334 = 0.000000000 0.000000000 + x = -1.855921455 + -2.333333334 x = -1.855921455 + -2.333333334 Combine like terms: -1.855921455 + -2.333333334 = -4.189254789 x = -4.189254789 Simplifying x = -4.189254789Solution
The solution to the problem is based on the solutions from the subproblems. x = {-0.477411879, -4.189254789}Solution
x = {-0.477411879, -4.189254789}
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