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Simplifying -1x4 + -2x2 + -90 = 0 Reorder the terms: -90 + -2x2 + -1x4 = 0 Solving -90 + -2x2 + -1x4 = 0 Solving for variable 'x'. Factor out the Greatest Common Factor (GCF), '-1'. -1(90 + 2x2 + x4) = 0 Ignore the factor -1.Subproblem 1
Set the factor '(90 + 2x2 + x4)' equal to zero and attempt to solve: Simplifying 90 + 2x2 + x4 = 0 Solving 90 + 2x2 + x4 = 0 Begin completing the square. Move the constant term to the right: Add '-90' to each side of the equation. 90 + 2x2 + -90 + x4 = 0 + -90 Reorder the terms: 90 + -90 + 2x2 + x4 = 0 + -90 Combine like terms: 90 + -90 = 0 0 + 2x2 + x4 = 0 + -90 2x2 + x4 = 0 + -90 Combine like terms: 0 + -90 = -90 2x2 + x4 = -90 The x term is 2x2. Take half its coefficient (1). Square it (1) and add it to both sides. Add '1' to each side of the equation. 2x2 + 1 + x4 = -90 + 1 Reorder the terms: 1 + 2x2 + x4 = -90 + 1 Combine like terms: -90 + 1 = -89 1 + 2x2 + x4 = -89 Factor a perfect square on the left side: (x2 + 1)(x2 + 1) = -89 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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