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Simplifying 9x2 + -42x + 36 = 0 Reorder the terms: 36 + -42x + 9x2 = 0 Solving 36 + -42x + 9x2 = 0 Solving for variable 'x'. Factor out the Greatest Common Factor (GCF), '3'. 3(12 + -14x + 3x2) = 0 Ignore the factor 3.Subproblem 1
Set the factor '(12 + -14x + 3x2)' equal to zero and attempt to solve: Simplifying 12 + -14x + 3x2 = 0 Solving 12 + -14x + 3x2 = 0 Begin completing the square. Divide all terms by 3 the coefficient of the squared term: Divide each side by '3'. 4 + -4.666666667x + x2 = 0 Move the constant term to the right: Add '-4' to each side of the equation. 4 + -4.666666667x + -4 + x2 = 0 + -4 Reorder the terms: 4 + -4 + -4.666666667x + x2 = 0 + -4 Combine like terms: 4 + -4 = 0 0 + -4.666666667x + x2 = 0 + -4 -4.666666667x + x2 = 0 + -4 Combine like terms: 0 + -4 = -4 -4.666666667x + x2 = -4 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 = -4 + 5.444444448 Reorder the terms: 5.444444448 + -4.666666667x + x2 = -4 + 5.444444448 Combine like terms: -4 + 5.444444448 = 1.444444448 5.444444448 + -4.666666667x + x2 = 1.444444448 Factor a perfect square on the left side: (x + -2.333333334)(x + -2.333333334) = 1.444444448 Calculate the square root of the right side: 1.201850427 Break this problem into two subproblems by setting (x + -2.333333334) equal to 1.201850427 and -1.201850427.Subproblem 1
x + -2.333333334 = 1.201850427 Simplifying x + -2.333333334 = 1.201850427 Reorder the terms: -2.333333334 + x = 1.201850427 Solving -2.333333334 + x = 1.201850427 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 = 1.201850427 + 2.333333334 Combine like terms: -2.333333334 + 2.333333334 = 0.000000000 0.000000000 + x = 1.201850427 + 2.333333334 x = 1.201850427 + 2.333333334 Combine like terms: 1.201850427 + 2.333333334 = 3.535183761 x = 3.535183761 Simplifying x = 3.535183761Subproblem 2
x + -2.333333334 = -1.201850427 Simplifying x + -2.333333334 = -1.201850427 Reorder the terms: -2.333333334 + x = -1.201850427 Solving -2.333333334 + x = -1.201850427 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 = -1.201850427 + 2.333333334 Combine like terms: -2.333333334 + 2.333333334 = 0.000000000 0.000000000 + x = -1.201850427 + 2.333333334 x = -1.201850427 + 2.333333334 Combine like terms: -1.201850427 + 2.333333334 = 1.131482907 x = 1.131482907 Simplifying x = 1.131482907Solution
The solution to the problem is based on the solutions from the subproblems. x = {3.535183761, 1.131482907}Solution
x = {3.535183761, 1.131482907}
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