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Simplifying 0 = x2 + 9x + 256 Reorder the terms: 0 = 256 + 9x + x2 Solving 0 = 256 + 9x + x2 Solving for variable 'x'. Combine like terms: 0 + -256 = -256 -256 + -9x + -1x2 = 256 + 9x + x2 + -256 + -9x + -1x2 Reorder the terms: -256 + -9x + -1x2 = 256 + -256 + 9x + -9x + x2 + -1x2 Combine like terms: 256 + -256 = 0 -256 + -9x + -1x2 = 0 + 9x + -9x + x2 + -1x2 -256 + -9x + -1x2 = 9x + -9x + x2 + -1x2 Combine like terms: 9x + -9x = 0 -256 + -9x + -1x2 = 0 + x2 + -1x2 -256 + -9x + -1x2 = x2 + -1x2 Combine like terms: x2 + -1x2 = 0 -256 + -9x + -1x2 = 0 Factor out the Greatest Common Factor (GCF), '-1'. -1(256 + 9x + x2) = 0 Ignore the factor -1.Subproblem 1
Set the factor '(256 + 9x + x2)' equal to zero and attempt to solve: Simplifying 256 + 9x + x2 = 0 Solving 256 + 9x + x2 = 0 Begin completing the square. Move the constant term to the right: Add '-256' to each side of the equation. 256 + 9x + -256 + x2 = 0 + -256 Reorder the terms: 256 + -256 + 9x + x2 = 0 + -256 Combine like terms: 256 + -256 = 0 0 + 9x + x2 = 0 + -256 9x + x2 = 0 + -256 Combine like terms: 0 + -256 = -256 9x + x2 = -256 The x term is 9x. Take half its coefficient (4.5). Square it (20.25) and add it to both sides. Add '20.25' to each side of the equation. 9x + 20.25 + x2 = -256 + 20.25 Reorder the terms: 20.25 + 9x + x2 = -256 + 20.25 Combine like terms: -256 + 20.25 = -235.75 20.25 + 9x + x2 = -235.75 Factor a perfect square on the left side: (x + 4.5)(x + 4.5) = -235.75 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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