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Simplifying 180 = (x + 10)(3x + -5) Reorder the terms: 180 = (10 + x)(3x + -5) Reorder the terms: 180 = (10 + x)(-5 + 3x) Multiply (10 + x) * (-5 + 3x) 180 = (10(-5 + 3x) + x(-5 + 3x)) 180 = ((-5 * 10 + 3x * 10) + x(-5 + 3x)) 180 = ((-50 + 30x) + x(-5 + 3x)) 180 = (-50 + 30x + (-5 * x + 3x * x)) 180 = (-50 + 30x + (-5x + 3x2)) Combine like terms: 30x + -5x = 25x 180 = (-50 + 25x + 3x2) Solving 180 = -50 + 25x + 3x2 Solving for variable 'x'. Combine like terms: 180 + 50 = 230 230 + -25x + -3x2 = -50 + 25x + 3x2 + 50 + -25x + -3x2 Reorder the terms: 230 + -25x + -3x2 = -50 + 50 + 25x + -25x + 3x2 + -3x2 Combine like terms: -50 + 50 = 0 230 + -25x + -3x2 = 0 + 25x + -25x + 3x2 + -3x2 230 + -25x + -3x2 = 25x + -25x + 3x2 + -3x2 Combine like terms: 25x + -25x = 0 230 + -25x + -3x2 = 0 + 3x2 + -3x2 230 + -25x + -3x2 = 3x2 + -3x2 Combine like terms: 3x2 + -3x2 = 0 230 + -25x + -3x2 = 0 Begin completing the square. Divide all terms by -3 the coefficient of the squared term: Divide each side by '-3'. -76.66666667 + 8.333333333x + x2 = 0 Move the constant term to the right: Add '76.66666667' to each side of the equation. -76.66666667 + 8.333333333x + 76.66666667 + x2 = 0 + 76.66666667 Reorder the terms: -76.66666667 + 76.66666667 + 8.333333333x + x2 = 0 + 76.66666667 Combine like terms: -76.66666667 + 76.66666667 = 0.00000000 0.00000000 + 8.333333333x + x2 = 0 + 76.66666667 8.333333333x + x2 = 0 + 76.66666667 Combine like terms: 0 + 76.66666667 = 76.66666667 8.333333333x + x2 = 76.66666667 The x term is 8.333333333x. Take half its coefficient (4.166666667). Square it (17.36111111) and add it to both sides. Add '17.36111111' to each side of the equation. 8.333333333x + 17.36111111 + x2 = 76.66666667 + 17.36111111 Reorder the terms: 17.36111111 + 8.333333333x + x2 = 76.66666667 + 17.36111111 Combine like terms: 76.66666667 + 17.36111111 = 94.02777778 17.36111111 + 8.333333333x + x2 = 94.02777778 Factor a perfect square on the left side: (x + 4.166666667)(x + 4.166666667) = 94.02777778 Calculate the square root of the right side: 9.696792139 Break this problem into two subproblems by setting (x + 4.166666667) equal to 9.696792139 and -9.696792139.Subproblem 1
x + 4.166666667 = 9.696792139 Simplifying x + 4.166666667 = 9.696792139 Reorder the terms: 4.166666667 + x = 9.696792139 Solving 4.166666667 + x = 9.696792139 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4.166666667' to each side of the equation. 4.166666667 + -4.166666667 + x = 9.696792139 + -4.166666667 Combine like terms: 4.166666667 + -4.166666667 = 0.000000000 0.000000000 + x = 9.696792139 + -4.166666667 x = 9.696792139 + -4.166666667 Combine like terms: 9.696792139 + -4.166666667 = 5.530125472 x = 5.530125472 Simplifying x = 5.530125472Subproblem 2
x + 4.166666667 = -9.696792139 Simplifying x + 4.166666667 = -9.696792139 Reorder the terms: 4.166666667 + x = -9.696792139 Solving 4.166666667 + x = -9.696792139 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4.166666667' to each side of the equation. 4.166666667 + -4.166666667 + x = -9.696792139 + -4.166666667 Combine like terms: 4.166666667 + -4.166666667 = 0.000000000 0.000000000 + x = -9.696792139 + -4.166666667 x = -9.696792139 + -4.166666667 Combine like terms: -9.696792139 + -4.166666667 = -13.863458806 x = -13.863458806 Simplifying x = -13.863458806Solution
The solution to the problem is based on the solutions from the subproblems. x = {5.530125472, -13.863458806}
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