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Simplifying 5x2 + 3x + -2x2 + 7 + -8 = 25 Reorder the terms: 7 + -8 + 3x + 5x2 + -2x2 = 25 Combine like terms: 7 + -8 = -1 -1 + 3x + 5x2 + -2x2 = 25 Combine like terms: 5x2 + -2x2 = 3x2 -1 + 3x + 3x2 = 25 Solving -1 + 3x + 3x2 = 25 Solving for variable 'x'. Reorder the terms: -1 + -25 + 3x + 3x2 = 25 + -25 Combine like terms: -1 + -25 = -26 -26 + 3x + 3x2 = 25 + -25 Combine like terms: 25 + -25 = 0 -26 + 3x + 3x2 = 0 Begin completing the square. Divide all terms by 3 the coefficient of the squared term: Divide each side by '3'. -8.666666667 + x + x2 = 0 Move the constant term to the right: Add '8.666666667' to each side of the equation. -8.666666667 + x + 8.666666667 + x2 = 0 + 8.666666667 Reorder the terms: -8.666666667 + 8.666666667 + x + x2 = 0 + 8.666666667 Combine like terms: -8.666666667 + 8.666666667 = 0.000000000 0.000000000 + x + x2 = 0 + 8.666666667 x + x2 = 0 + 8.666666667 Combine like terms: 0 + 8.666666667 = 8.666666667 x + x2 = 8.666666667 The x term is x. Take half its coefficient (0.5). Square it (0.25) and add it to both sides. Add '0.25' to each side of the equation. + 0.25 + x2 = 8.666666667 + 0.25 Combine like terms: + 0.25 = 1.25 1.25 + x2 = 8.666666667 + 0.25 Combine like terms: 8.666666667 + 0.25 = 8.916666667 1.25 + x2 = 8.916666667 Factor a perfect square on the left side: (x + 0.5)(x + 0.5) = 8.916666667 Calculate the square root of the right side: 2.986078811 Break this problem into two subproblems by setting (x + 0.5) equal to 2.986078811 and -2.986078811.Subproblem 1
x + 0.5 = 2.986078811 Simplifying x + 0.5 = 2.986078811 Reorder the terms: 0.5 + x = 2.986078811 Solving 0.5 + x = 2.986078811 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = 2.986078811 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = 2.986078811 + -0.5 x = 2.986078811 + -0.5 Combine like terms: 2.986078811 + -0.5 = 2.486078811 x = 2.486078811 Simplifying x = 2.486078811Subproblem 2
x + 0.5 = -2.986078811 Simplifying x + 0.5 = -2.986078811 Reorder the terms: 0.5 + x = -2.986078811 Solving 0.5 + x = -2.986078811 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = -2.986078811 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = -2.986078811 + -0.5 x = -2.986078811 + -0.5 Combine like terms: -2.986078811 + -0.5 = -3.486078811 x = -3.486078811 Simplifying x = -3.486078811Solution
The solution to the problem is based on the solutions from the subproblems. x = {2.486078811, -3.486078811}
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