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Simplifying -2x2 + 6x = 56 Reorder the terms: 6x + -2x2 = 56 Solving 6x + -2x2 = 56 Solving for variable 'x'. Reorder the terms: -56 + 6x + -2x2 = 56 + -56 Combine like terms: 56 + -56 = 0 -56 + 6x + -2x2 = 0 Factor out the Greatest Common Factor (GCF), '2'. 2(-28 + 3x + -1x2) = 0 Ignore the factor 2.Subproblem 1
Set the factor '(-28 + 3x + -1x2)' equal to zero and attempt to solve: Simplifying -28 + 3x + -1x2 = 0 Solving -28 + 3x + -1x2 = 0 Begin completing the square. Divide all terms by -1 the coefficient of the squared term: Divide each side by '-1'. 28 + -3x + x2 = 0 Move the constant term to the right: Add '-28' to each side of the equation. 28 + -3x + -28 + x2 = 0 + -28 Reorder the terms: 28 + -28 + -3x + x2 = 0 + -28 Combine like terms: 28 + -28 = 0 0 + -3x + x2 = 0 + -28 -3x + x2 = 0 + -28 Combine like terms: 0 + -28 = -28 -3x + x2 = -28 The x term is -3x. Take half its coefficient (-1.5). Square it (2.25) and add it to both sides. Add '2.25' to each side of the equation. -3x + 2.25 + x2 = -28 + 2.25 Reorder the terms: 2.25 + -3x + x2 = -28 + 2.25 Combine like terms: -28 + 2.25 = -25.75 2.25 + -3x + x2 = -25.75 Factor a perfect square on the left side: (x + -1.5)(x + -1.5) = -25.75 Can't calculate square root of the right side. The solution to this equation could not be determined. This subproblem is being ignored because a solution could not be determined. The solution to this equation could not be determined.
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