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Simplifying 0 = x3 + 2x2 + 8x Reorder the terms: 0 = 8x + 2x2 + x3 Solving 0 = 8x + 2x2 + x3 Solving for variable 'x'. Remove the zero: -8x + -2x2 + -1x3 = 8x + 2x2 + x3 + -8x + -2x2 + -1x3 Reorder the terms: -8x + -2x2 + -1x3 = 8x + -8x + 2x2 + -2x2 + x3 + -1x3 Combine like terms: 8x + -8x = 0 -8x + -2x2 + -1x3 = 0 + 2x2 + -2x2 + x3 + -1x3 -8x + -2x2 + -1x3 = 2x2 + -2x2 + x3 + -1x3 Combine like terms: 2x2 + -2x2 = 0 -8x + -2x2 + -1x3 = 0 + x3 + -1x3 -8x + -2x2 + -1x3 = x3 + -1x3 Combine like terms: x3 + -1x3 = 0 -8x + -2x2 + -1x3 = 0 Factor out the Greatest Common Factor (GCF), '-1x'. -1x(8 + 2x + x2) = 0 Ignore the factor -1.Subproblem 1
Set the factor 'x' equal to zero and attempt to solve: Simplifying x = 0 Solving x = 0 Move all terms containing x to the left, all other terms to the right. Simplifying x = 0Subproblem 2
Set the factor '(8 + 2x + x2)' equal to zero and attempt to solve: Simplifying 8 + 2x + x2 = 0 Solving 8 + 2x + x2 = 0 Begin completing the square. Move the constant term to the right: Add '-8' to each side of the equation. 8 + 2x + -8 + x2 = 0 + -8 Reorder the terms: 8 + -8 + 2x + x2 = 0 + -8 Combine like terms: 8 + -8 = 0 0 + 2x + x2 = 0 + -8 2x + x2 = 0 + -8 Combine like terms: 0 + -8 = -8 2x + x2 = -8 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 = -8 + 1 Reorder the terms: 1 + 2x + x2 = -8 + 1 Combine like terms: -8 + 1 = -7 1 + 2x + x2 = -7 Factor a perfect square on the left side: (x + 1)(x + 1) = -7 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.Solution
x = {0}
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