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Simplifying 16x2 + -64x + 56 = 0 Reorder the terms: 56 + -64x + 16x2 = 0 Solving 56 + -64x + 16x2 = 0 Solving for variable 'x'. Factor out the Greatest Common Factor (GCF), '8'. 8(7 + -8x + 2x2) = 0 Ignore the factor 8.Subproblem 1
Set the factor '(7 + -8x + 2x2)' equal to zero and attempt to solve: Simplifying 7 + -8x + 2x2 = 0 Solving 7 + -8x + 2x2 = 0 Begin completing the square. Divide all terms by 2 the coefficient of the squared term: Divide each side by '2'. 3.5 + -4x + x2 = 0 Move the constant term to the right: Add '-3.5' to each side of the equation. 3.5 + -4x + -3.5 + x2 = 0 + -3.5 Reorder the terms: 3.5 + -3.5 + -4x + x2 = 0 + -3.5 Combine like terms: 3.5 + -3.5 = 0.0 0.0 + -4x + x2 = 0 + -3.5 -4x + x2 = 0 + -3.5 Combine like terms: 0 + -3.5 = -3.5 -4x + x2 = -3.5 The x term is -4x. Take half its coefficient (-2). Square it (4) and add it to both sides. Add '4' to each side of the equation. -4x + 4 + x2 = -3.5 + 4 Reorder the terms: 4 + -4x + x2 = -3.5 + 4 Combine like terms: -3.5 + 4 = 0.5 4 + -4x + x2 = 0.5 Factor a perfect square on the left side: (x + -2)(x + -2) = 0.5 Calculate the square root of the right side: 0.707106781 Break this problem into two subproblems by setting (x + -2) equal to 0.707106781 and -0.707106781.Subproblem 1
x + -2 = 0.707106781 Simplifying x + -2 = 0.707106781 Reorder the terms: -2 + x = 0.707106781 Solving -2 + x = 0.707106781 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + x = 0.707106781 + 2 Combine like terms: -2 + 2 = 0 0 + x = 0.707106781 + 2 x = 0.707106781 + 2 Combine like terms: 0.707106781 + 2 = 2.707106781 x = 2.707106781 Simplifying x = 2.707106781Subproblem 2
x + -2 = -0.707106781 Simplifying x + -2 = -0.707106781 Reorder the terms: -2 + x = -0.707106781 Solving -2 + x = -0.707106781 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + x = -0.707106781 + 2 Combine like terms: -2 + 2 = 0 0 + x = -0.707106781 + 2 x = -0.707106781 + 2 Combine like terms: -0.707106781 + 2 = 1.292893219 x = 1.292893219 Simplifying x = 1.292893219Solution
The solution to the problem is based on the solutions from the subproblems. x = {2.707106781, 1.292893219}Solution
x = {2.707106781, 1.292893219}
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