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Simplifying 9x2 + -64x + 75 = 0 Reorder the terms: 75 + -64x + 9x2 = 0 Solving 75 + -64x + 9x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by 9 the coefficient of the squared term: Divide each side by '9'. 8.333333333 + -7.111111111x + x2 = 0 Move the constant term to the right: Add '-8.333333333' to each side of the equation. 8.333333333 + -7.111111111x + -8.333333333 + x2 = 0 + -8.333333333 Reorder the terms: 8.333333333 + -8.333333333 + -7.111111111x + x2 = 0 + -8.333333333 Combine like terms: 8.333333333 + -8.333333333 = 0.000000000 0.000000000 + -7.111111111x + x2 = 0 + -8.333333333 -7.111111111x + x2 = 0 + -8.333333333 Combine like terms: 0 + -8.333333333 = -8.333333333 -7.111111111x + x2 = -8.333333333 The x term is -7.111111111x. Take half its coefficient (-3.555555556). Square it (12.64197531) and add it to both sides. Add '12.64197531' to each side of the equation. -7.111111111x + 12.64197531 + x2 = -8.333333333 + 12.64197531 Reorder the terms: 12.64197531 + -7.111111111x + x2 = -8.333333333 + 12.64197531 Combine like terms: -8.333333333 + 12.64197531 = 4.308641977 12.64197531 + -7.111111111x + x2 = 4.308641977 Factor a perfect square on the left side: (x + -3.555555556)(x + -3.555555556) = 4.308641977 Calculate the square root of the right side: 2.075726855 Break this problem into two subproblems by setting (x + -3.555555556) equal to 2.075726855 and -2.075726855.Subproblem 1
x + -3.555555556 = 2.075726855 Simplifying x + -3.555555556 = 2.075726855 Reorder the terms: -3.555555556 + x = 2.075726855 Solving -3.555555556 + x = 2.075726855 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.555555556' to each side of the equation. -3.555555556 + 3.555555556 + x = 2.075726855 + 3.555555556 Combine like terms: -3.555555556 + 3.555555556 = 0.000000000 0.000000000 + x = 2.075726855 + 3.555555556 x = 2.075726855 + 3.555555556 Combine like terms: 2.075726855 + 3.555555556 = 5.631282411 x = 5.631282411 Simplifying x = 5.631282411Subproblem 2
x + -3.555555556 = -2.075726855 Simplifying x + -3.555555556 = -2.075726855 Reorder the terms: -3.555555556 + x = -2.075726855 Solving -3.555555556 + x = -2.075726855 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.555555556' to each side of the equation. -3.555555556 + 3.555555556 + x = -2.075726855 + 3.555555556 Combine like terms: -3.555555556 + 3.555555556 = 0.000000000 0.000000000 + x = -2.075726855 + 3.555555556 x = -2.075726855 + 3.555555556 Combine like terms: -2.075726855 + 3.555555556 = 1.479828701 x = 1.479828701 Simplifying x = 1.479828701Solution
The solution to the problem is based on the solutions from the subproblems. x = {5.631282411, 1.479828701}
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