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Simplifying 4x2 + -56x + -20 = 0 Reorder the terms: -20 + -56x + 4x2 = 0 Solving -20 + -56x + 4x2 = 0 Solving for variable 'x'. Factor out the Greatest Common Factor (GCF), '4'. 4(-5 + -14x + x2) = 0 Ignore the factor 4.Subproblem 1
Set the factor '(-5 + -14x + x2)' equal to zero and attempt to solve: Simplifying -5 + -14x + x2 = 0 Solving -5 + -14x + x2 = 0 Begin completing the square. Move the constant term to the right: Add '5' to each side of the equation. -5 + -14x + 5 + x2 = 0 + 5 Reorder the terms: -5 + 5 + -14x + x2 = 0 + 5 Combine like terms: -5 + 5 = 0 0 + -14x + x2 = 0 + 5 -14x + x2 = 0 + 5 Combine like terms: 0 + 5 = 5 -14x + x2 = 5 The x term is -14x. Take half its coefficient (-7). Square it (49) and add it to both sides. Add '49' to each side of the equation. -14x + 49 + x2 = 5 + 49 Reorder the terms: 49 + -14x + x2 = 5 + 49 Combine like terms: 5 + 49 = 54 49 + -14x + x2 = 54 Factor a perfect square on the left side: (x + -7)(x + -7) = 54 Calculate the square root of the right side: 7.348469228 Break this problem into two subproblems by setting (x + -7) equal to 7.348469228 and -7.348469228.Subproblem 1
x + -7 = 7.348469228 Simplifying x + -7 = 7.348469228 Reorder the terms: -7 + x = 7.348469228 Solving -7 + x = 7.348469228 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '7' to each side of the equation. -7 + 7 + x = 7.348469228 + 7 Combine like terms: -7 + 7 = 0 0 + x = 7.348469228 + 7 x = 7.348469228 + 7 Combine like terms: 7.348469228 + 7 = 14.348469228 x = 14.348469228 Simplifying x = 14.348469228Subproblem 2
x + -7 = -7.348469228 Simplifying x + -7 = -7.348469228 Reorder the terms: -7 + x = -7.348469228 Solving -7 + x = -7.348469228 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '7' to each side of the equation. -7 + 7 + x = -7.348469228 + 7 Combine like terms: -7 + 7 = 0 0 + x = -7.348469228 + 7 x = -7.348469228 + 7 Combine like terms: -7.348469228 + 7 = -0.348469228 x = -0.348469228 Simplifying x = -0.348469228Solution
The solution to the problem is based on the solutions from the subproblems. x = {14.348469228, -0.348469228}Solution
x = {14.348469228, -0.348469228}
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