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Simplifying 3x(x + 7) + -2(3 + -1x) = 35 Reorder the terms: 3x(7 + x) + -2(3 + -1x) = 35 (7 * 3x + x * 3x) + -2(3 + -1x) = 35 (21x + 3x2) + -2(3 + -1x) = 35 21x + 3x2 + (3 * -2 + -1x * -2) = 35 21x + 3x2 + (-6 + 2x) = 35 Reorder the terms: -6 + 21x + 2x + 3x2 = 35 Combine like terms: 21x + 2x = 23x -6 + 23x + 3x2 = 35 Solving -6 + 23x + 3x2 = 35 Solving for variable 'x'. Reorder the terms: -6 + -35 + 23x + 3x2 = 35 + -35 Combine like terms: -6 + -35 = -41 -41 + 23x + 3x2 = 35 + -35 Combine like terms: 35 + -35 = 0 -41 + 23x + 3x2 = 0 Begin completing the square. Divide all terms by 3 the coefficient of the squared term: Divide each side by '3'. -13.66666667 + 7.666666667x + x2 = 0 Move the constant term to the right: Add '13.66666667' to each side of the equation. -13.66666667 + 7.666666667x + 13.66666667 + x2 = 0 + 13.66666667 Reorder the terms: -13.66666667 + 13.66666667 + 7.666666667x + x2 = 0 + 13.66666667 Combine like terms: -13.66666667 + 13.66666667 = 0.00000000 0.00000000 + 7.666666667x + x2 = 0 + 13.66666667 7.666666667x + x2 = 0 + 13.66666667 Combine like terms: 0 + 13.66666667 = 13.66666667 7.666666667x + x2 = 13.66666667 The x term is 7.666666667x. Take half its coefficient (3.833333334). Square it (14.69444445) and add it to both sides. Add '14.69444445' to each side of the equation. 7.666666667x + 14.69444445 + x2 = 13.66666667 + 14.69444445 Reorder the terms: 14.69444445 + 7.666666667x + x2 = 13.66666667 + 14.69444445 Combine like terms: 13.66666667 + 14.69444445 = 28.36111112 14.69444445 + 7.666666667x + x2 = 28.36111112 Factor a perfect square on the left side: (x + 3.833333334)(x + 3.833333334) = 28.36111112 Calculate the square root of the right side: 5.325515104 Break this problem into two subproblems by setting (x + 3.833333334) equal to 5.325515104 and -5.325515104.Subproblem 1
x + 3.833333334 = 5.325515104 Simplifying x + 3.833333334 = 5.325515104 Reorder the terms: 3.833333334 + x = 5.325515104 Solving 3.833333334 + x = 5.325515104 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3.833333334' to each side of the equation. 3.833333334 + -3.833333334 + x = 5.325515104 + -3.833333334 Combine like terms: 3.833333334 + -3.833333334 = 0.000000000 0.000000000 + x = 5.325515104 + -3.833333334 x = 5.325515104 + -3.833333334 Combine like terms: 5.325515104 + -3.833333334 = 1.49218177 x = 1.49218177 Simplifying x = 1.49218177Subproblem 2
x + 3.833333334 = -5.325515104 Simplifying x + 3.833333334 = -5.325515104 Reorder the terms: 3.833333334 + x = -5.325515104 Solving 3.833333334 + x = -5.325515104 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3.833333334' to each side of the equation. 3.833333334 + -3.833333334 + x = -5.325515104 + -3.833333334 Combine like terms: 3.833333334 + -3.833333334 = 0.000000000 0.000000000 + x = -5.325515104 + -3.833333334 x = -5.325515104 + -3.833333334 Combine like terms: -5.325515104 + -3.833333334 = -9.158848438 x = -9.158848438 Simplifying x = -9.158848438Solution
The solution to the problem is based on the solutions from the subproblems. x = {1.49218177, -9.158848438}
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