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Simplifying -16x = 8x2 + 20 Reorder the terms: -16x = 20 + 8x2 Solving -16x = 20 + 8x2 Solving for variable 'x'. Reorder the terms: -20 + -16x + -8x2 = 20 + 8x2 + -20 + -8x2 Reorder the terms: -20 + -16x + -8x2 = 20 + -20 + 8x2 + -8x2 Combine like terms: 20 + -20 = 0 -20 + -16x + -8x2 = 0 + 8x2 + -8x2 -20 + -16x + -8x2 = 8x2 + -8x2 Combine like terms: 8x2 + -8x2 = 0 -20 + -16x + -8x2 = 0 Factor out the Greatest Common Factor (GCF), '-4'. -4(5 + 4x + 2x2) = 0 Ignore the factor -4.Subproblem 1
Set the factor '(5 + 4x + 2x2)' equal to zero and attempt to solve: Simplifying 5 + 4x + 2x2 = 0 Solving 5 + 4x + 2x2 = 0 Begin completing the square. Divide all terms by 2 the coefficient of the squared term: Divide each side by '2'. 2.5 + 2x + x2 = 0 Move the constant term to the right: Add '-2.5' to each side of the equation. 2.5 + 2x + -2.5 + x2 = 0 + -2.5 Reorder the terms: 2.5 + -2.5 + 2x + x2 = 0 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + 2x + x2 = 0 + -2.5 2x + x2 = 0 + -2.5 Combine like terms: 0 + -2.5 = -2.5 2x + x2 = -2.5 The x term is 2x. Take half its coefficient (1). Square it (1) and add it to both sides. Add '1' to each side of the equation. 2x + 1 + x2 = -2.5 + 1 Reorder the terms: 1 + 2x + x2 = -2.5 + 1 Combine like terms: -2.5 + 1 = -1.5 1 + 2x + x2 = -1.5 Factor a perfect square on the left side: (x + 1)(x + 1) = -1.5 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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