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Simplifying (2x2 + -7x + 1) + (5x2 + -1x + -8) = 0 Reorder the terms: (1 + -7x + 2x2) + (5x2 + -1x + -8) = 0 Remove parenthesis around (1 + -7x + 2x2) 1 + -7x + 2x2 + (5x2 + -1x + -8) = 0 Reorder the terms: 1 + -7x + 2x2 + (-8 + -1x + 5x2) = 0 Remove parenthesis around (-8 + -1x + 5x2) 1 + -7x + 2x2 + -8 + -1x + 5x2 = 0 Reorder the terms: 1 + -8 + -7x + -1x + 2x2 + 5x2 = 0 Combine like terms: 1 + -8 = -7 -7 + -7x + -1x + 2x2 + 5x2 = 0 Combine like terms: -7x + -1x = -8x -7 + -8x + 2x2 + 5x2 = 0 Combine like terms: 2x2 + 5x2 = 7x2 -7 + -8x + 7x2 = 0 Solving -7 + -8x + 7x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by 7 the coefficient of the squared term: Divide each side by '7'. -1 + -1.142857143x + x2 = 0 Move the constant term to the right: Add '1' to each side of the equation. -1 + -1.142857143x + 1 + x2 = 0 + 1 Reorder the terms: -1 + 1 + -1.142857143x + x2 = 0 + 1 Combine like terms: -1 + 1 = 0 0 + -1.142857143x + x2 = 0 + 1 -1.142857143x + x2 = 0 + 1 Combine like terms: 0 + 1 = 1 -1.142857143x + x2 = 1 The x term is -1.142857143x. Take half its coefficient (-0.5714285715). Square it (0.3265306123) and add it to both sides. Add '0.3265306123' to each side of the equation. -1.142857143x + 0.3265306123 + x2 = 1 + 0.3265306123 Reorder the terms: 0.3265306123 + -1.142857143x + x2 = 1 + 0.3265306123 Combine like terms: 1 + 0.3265306123 = 1.3265306123 0.3265306123 + -1.142857143x + x2 = 1.3265306123 Factor a perfect square on the left side: (x + -0.5714285715)(x + -0.5714285715) = 1.3265306123 Calculate the square root of the right side: 1.151751107 Break this problem into two subproblems by setting (x + -0.5714285715) equal to 1.151751107 and -1.151751107.Subproblem 1
x + -0.5714285715 = 1.151751107 Simplifying x + -0.5714285715 = 1.151751107 Reorder the terms: -0.5714285715 + x = 1.151751107 Solving -0.5714285715 + x = 1.151751107 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.5714285715' to each side of the equation. -0.5714285715 + 0.5714285715 + x = 1.151751107 + 0.5714285715 Combine like terms: -0.5714285715 + 0.5714285715 = 0.0000000000 0.0000000000 + x = 1.151751107 + 0.5714285715 x = 1.151751107 + 0.5714285715 Combine like terms: 1.151751107 + 0.5714285715 = 1.7231796785 x = 1.7231796785 Simplifying x = 1.7231796785Subproblem 2
x + -0.5714285715 = -1.151751107 Simplifying x + -0.5714285715 = -1.151751107 Reorder the terms: -0.5714285715 + x = -1.151751107 Solving -0.5714285715 + x = -1.151751107 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.5714285715' to each side of the equation. -0.5714285715 + 0.5714285715 + x = -1.151751107 + 0.5714285715 Combine like terms: -0.5714285715 + 0.5714285715 = 0.0000000000 0.0000000000 + x = -1.151751107 + 0.5714285715 x = -1.151751107 + 0.5714285715 Combine like terms: -1.151751107 + 0.5714285715 = -0.5803225355 x = -0.5803225355 Simplifying x = -0.5803225355Solution
The solution to the problem is based on the solutions from the subproblems. x = {1.7231796785, -0.5803225355}
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