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Simplifying -56 + 8x + -4x2 = 8 Solving -56 + 8x + -4x2 = 8 Solving for variable 'x'. Reorder the terms: -56 + -8 + 8x + -4x2 = 8 + -8 Combine like terms: -56 + -8 = -64 -64 + 8x + -4x2 = 8 + -8 Combine like terms: 8 + -8 = 0 -64 + 8x + -4x2 = 0 Factor out the Greatest Common Factor (GCF), '4'. 4(-16 + 2x + -1x2) = 0 Ignore the factor 4.Subproblem 1
Set the factor '(-16 + 2x + -1x2)' equal to zero and attempt to solve: Simplifying -16 + 2x + -1x2 = 0 Solving -16 + 2x + -1x2 = 0 Begin completing the square. Divide all terms by -1 the coefficient of the squared term: Divide each side by '-1'. 16 + -2x + x2 = 0 Move the constant term to the right: Add '-16' to each side of the equation. 16 + -2x + -16 + x2 = 0 + -16 Reorder the terms: 16 + -16 + -2x + x2 = 0 + -16 Combine like terms: 16 + -16 = 0 0 + -2x + x2 = 0 + -16 -2x + x2 = 0 + -16 Combine like terms: 0 + -16 = -16 -2x + x2 = -16 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 = -16 + 1 Reorder the terms: 1 + -2x + x2 = -16 + 1 Combine like terms: -16 + 1 = -15 1 + -2x + x2 = -15 Factor a perfect square on the left side: (x + -1)(x + -1) = -15 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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