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Simplifying 9x2 + -12x + 4 = 17 Reorder the terms: 4 + -12x + 9x2 = 17 Solving 4 + -12x + 9x2 = 17 Solving for variable 'x'. Reorder the terms: 4 + -17 + -12x + 9x2 = 17 + -17 Combine like terms: 4 + -17 = -13 -13 + -12x + 9x2 = 17 + -17 Combine like terms: 17 + -17 = 0 -13 + -12x + 9x2 = 0 Begin completing the square. Divide all terms by 9 the coefficient of the squared term: Divide each side by '9'. -1.444444444 + -1.333333333x + x2 = 0 Move the constant term to the right: Add '1.444444444' to each side of the equation. -1.444444444 + -1.333333333x + 1.444444444 + x2 = 0 + 1.444444444 Reorder the terms: -1.444444444 + 1.444444444 + -1.333333333x + x2 = 0 + 1.444444444 Combine like terms: -1.444444444 + 1.444444444 = 0.000000000 0.000000000 + -1.333333333x + x2 = 0 + 1.444444444 -1.333333333x + x2 = 0 + 1.444444444 Combine like terms: 0 + 1.444444444 = 1.444444444 -1.333333333x + x2 = 1.444444444 The x term is -1.333333333x. Take half its coefficient (-0.6666666665). Square it (0.4444444442) and add it to both sides. Add '0.4444444442' to each side of the equation. -1.333333333x + 0.4444444442 + x2 = 1.444444444 + 0.4444444442 Reorder the terms: 0.4444444442 + -1.333333333x + x2 = 1.444444444 + 0.4444444442 Combine like terms: 1.444444444 + 0.4444444442 = 1.8888888882 0.4444444442 + -1.333333333x + x2 = 1.8888888882 Factor a perfect square on the left side: (x + -0.6666666665)(x + -0.6666666665) = 1.8888888882 Calculate the square root of the right side: 1.374368542 Break this problem into two subproblems by setting (x + -0.6666666665) equal to 1.374368542 and -1.374368542.Subproblem 1
x + -0.6666666665 = 1.374368542 Simplifying x + -0.6666666665 = 1.374368542 Reorder the terms: -0.6666666665 + x = 1.374368542 Solving -0.6666666665 + x = 1.374368542 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.6666666665' to each side of the equation. -0.6666666665 + 0.6666666665 + x = 1.374368542 + 0.6666666665 Combine like terms: -0.6666666665 + 0.6666666665 = 0.0000000000 0.0000000000 + x = 1.374368542 + 0.6666666665 x = 1.374368542 + 0.6666666665 Combine like terms: 1.374368542 + 0.6666666665 = 2.0410352085 x = 2.0410352085 Simplifying x = 2.0410352085Subproblem 2
x + -0.6666666665 = -1.374368542 Simplifying x + -0.6666666665 = -1.374368542 Reorder the terms: -0.6666666665 + x = -1.374368542 Solving -0.6666666665 + x = -1.374368542 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.6666666665' to each side of the equation. -0.6666666665 + 0.6666666665 + x = -1.374368542 + 0.6666666665 Combine like terms: -0.6666666665 + 0.6666666665 = 0.0000000000 0.0000000000 + x = -1.374368542 + 0.6666666665 x = -1.374368542 + 0.6666666665 Combine like terms: -1.374368542 + 0.6666666665 = -0.7077018755 x = -0.7077018755 Simplifying x = -0.7077018755Solution
The solution to the problem is based on the solutions from the subproblems. x = {2.0410352085, -0.7077018755}
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