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Simplifying 8x2 + -22x + -15 = 0 Reorder the terms: -15 + -22x + 8x2 = 0 Solving -15 + -22x + 8x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by 8 the coefficient of the squared term: Divide each side by '8'. -1.875 + -2.75x + x2 = 0 Move the constant term to the right: Add '1.875' to each side of the equation. -1.875 + -2.75x + 1.875 + x2 = 0 + 1.875 Reorder the terms: -1.875 + 1.875 + -2.75x + x2 = 0 + 1.875 Combine like terms: -1.875 + 1.875 = 0.000 0.000 + -2.75x + x2 = 0 + 1.875 -2.75x + x2 = 0 + 1.875 Combine like terms: 0 + 1.875 = 1.875 -2.75x + x2 = 1.875 The x term is -2.75x. Take half its coefficient (-1.375). Square it (1.890625) and add it to both sides. Add '1.890625' to each side of the equation. -2.75x + 1.890625 + x2 = 1.875 + 1.890625 Reorder the terms: 1.890625 + -2.75x + x2 = 1.875 + 1.890625 Combine like terms: 1.875 + 1.890625 = 3.765625 1.890625 + -2.75x + x2 = 3.765625 Factor a perfect square on the left side: (x + -1.375)(x + -1.375) = 3.765625 Calculate the square root of the right side: 1.940521837 Break this problem into two subproblems by setting (x + -1.375) equal to 1.940521837 and -1.940521837.Subproblem 1
x + -1.375 = 1.940521837 Simplifying x + -1.375 = 1.940521837 Reorder the terms: -1.375 + x = 1.940521837 Solving -1.375 + x = 1.940521837 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.375' to each side of the equation. -1.375 + 1.375 + x = 1.940521837 + 1.375 Combine like terms: -1.375 + 1.375 = 0.000 0.000 + x = 1.940521837 + 1.375 x = 1.940521837 + 1.375 Combine like terms: 1.940521837 + 1.375 = 3.315521837 x = 3.315521837 Simplifying x = 3.315521837Subproblem 2
x + -1.375 = -1.940521837 Simplifying x + -1.375 = -1.940521837 Reorder the terms: -1.375 + x = -1.940521837 Solving -1.375 + x = -1.940521837 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.375' to each side of the equation. -1.375 + 1.375 + x = -1.940521837 + 1.375 Combine like terms: -1.375 + 1.375 = 0.000 0.000 + x = -1.940521837 + 1.375 x = -1.940521837 + 1.375 Combine like terms: -1.940521837 + 1.375 = -0.565521837 x = -0.565521837 Simplifying x = -0.565521837Solution
The solution to the problem is based on the solutions from the subproblems. x = {3.315521837, -0.565521837}
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