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Simplifying 3x2 + 36x + 55 = 0 Reorder the terms: 55 + 36x + 3x2 = 0 Solving 55 + 36x + 3x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by 3 the coefficient of the squared term: Divide each side by '3'. 18.33333333 + 12x + x2 = 0 Move the constant term to the right: Add '-18.33333333' to each side of the equation. 18.33333333 + 12x + -18.33333333 + x2 = 0 + -18.33333333 Reorder the terms: 18.33333333 + -18.33333333 + 12x + x2 = 0 + -18.33333333 Combine like terms: 18.33333333 + -18.33333333 = 0.00000000 0.00000000 + 12x + x2 = 0 + -18.33333333 12x + x2 = 0 + -18.33333333 Combine like terms: 0 + -18.33333333 = -18.33333333 12x + x2 = -18.33333333 The x term is 12x. Take half its coefficient (6). Square it (36) and add it to both sides. Add '36' to each side of the equation. 12x + 36 + x2 = -18.33333333 + 36 Reorder the terms: 36 + 12x + x2 = -18.33333333 + 36 Combine like terms: -18.33333333 + 36 = 17.66666667 36 + 12x + x2 = 17.66666667 Factor a perfect square on the left side: (x + 6)(x + 6) = 17.66666667 Calculate the square root of the right side: 4.203173405 Break this problem into two subproblems by setting (x + 6) equal to 4.203173405 and -4.203173405.Subproblem 1
x + 6 = 4.203173405 Simplifying x + 6 = 4.203173405 Reorder the terms: 6 + x = 4.203173405 Solving 6 + x = 4.203173405 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-6' to each side of the equation. 6 + -6 + x = 4.203173405 + -6 Combine like terms: 6 + -6 = 0 0 + x = 4.203173405 + -6 x = 4.203173405 + -6 Combine like terms: 4.203173405 + -6 = -1.796826595 x = -1.796826595 Simplifying x = -1.796826595Subproblem 2
x + 6 = -4.203173405 Simplifying x + 6 = -4.203173405 Reorder the terms: 6 + x = -4.203173405 Solving 6 + x = -4.203173405 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-6' to each side of the equation. 6 + -6 + x = -4.203173405 + -6 Combine like terms: 6 + -6 = 0 0 + x = -4.203173405 + -6 x = -4.203173405 + -6 Combine like terms: -4.203173405 + -6 = -10.203173405 x = -10.203173405 Simplifying x = -10.203173405Solution
The solution to the problem is based on the solutions from the subproblems. x = {-1.796826595, -10.203173405}
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