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Simplifying 8x2 + -53x + -56 = 0 Reorder the terms: -56 + -53x + 8x2 = 0 Solving -56 + -53x + 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'. -7 + -6.625x + x2 = 0 Move the constant term to the right: Add '7' to each side of the equation. -7 + -6.625x + 7 + x2 = 0 + 7 Reorder the terms: -7 + 7 + -6.625x + x2 = 0 + 7 Combine like terms: -7 + 7 = 0 0 + -6.625x + x2 = 0 + 7 -6.625x + x2 = 0 + 7 Combine like terms: 0 + 7 = 7 -6.625x + x2 = 7 The x term is -6.625x. Take half its coefficient (-3.3125). Square it (10.97265625) and add it to both sides. Add '10.97265625' to each side of the equation. -6.625x + 10.97265625 + x2 = 7 + 10.97265625 Reorder the terms: 10.97265625 + -6.625x + x2 = 7 + 10.97265625 Combine like terms: 7 + 10.97265625 = 17.97265625 10.97265625 + -6.625x + x2 = 17.97265625 Factor a perfect square on the left side: (x + -3.3125)(x + -3.3125) = 17.97265625 Calculate the square root of the right side: 4.239416971 Break this problem into two subproblems by setting (x + -3.3125) equal to 4.239416971 and -4.239416971.Subproblem 1
x + -3.3125 = 4.239416971 Simplifying x + -3.3125 = 4.239416971 Reorder the terms: -3.3125 + x = 4.239416971 Solving -3.3125 + x = 4.239416971 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.3125' to each side of the equation. -3.3125 + 3.3125 + x = 4.239416971 + 3.3125 Combine like terms: -3.3125 + 3.3125 = 0.0000 0.0000 + x = 4.239416971 + 3.3125 x = 4.239416971 + 3.3125 Combine like terms: 4.239416971 + 3.3125 = 7.551916971 x = 7.551916971 Simplifying x = 7.551916971Subproblem 2
x + -3.3125 = -4.239416971 Simplifying x + -3.3125 = -4.239416971 Reorder the terms: -3.3125 + x = -4.239416971 Solving -3.3125 + x = -4.239416971 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.3125' to each side of the equation. -3.3125 + 3.3125 + x = -4.239416971 + 3.3125 Combine like terms: -3.3125 + 3.3125 = 0.0000 0.0000 + x = -4.239416971 + 3.3125 x = -4.239416971 + 3.3125 Combine like terms: -4.239416971 + 3.3125 = -0.926916971 x = -0.926916971 Simplifying x = -0.926916971Solution
The solution to the problem is based on the solutions from the subproblems. x = {7.551916971, -0.926916971}
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