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Simplifying 9x2 + -54x + 729 = 0 Reorder the terms: 729 + -54x + 9x2 = 0 Solving 729 + -54x + 9x2 = 0 Solving for variable 'x'. Factor out the Greatest Common Factor (GCF), '9'. 9(81 + -6x + x2) = 0 Ignore the factor 9.Subproblem 1
Set the factor '(81 + -6x + x2)' equal to zero and attempt to solve: Simplifying 81 + -6x + x2 = 0 Solving 81 + -6x + x2 = 0 Begin completing the square. Move the constant term to the right: Add '-81' to each side of the equation. 81 + -6x + -81 + x2 = 0 + -81 Reorder the terms: 81 + -81 + -6x + x2 = 0 + -81 Combine like terms: 81 + -81 = 0 0 + -6x + x2 = 0 + -81 -6x + x2 = 0 + -81 Combine like terms: 0 + -81 = -81 -6x + x2 = -81 The x term is -6x. Take half its coefficient (-3). Square it (9) and add it to both sides. Add '9' to each side of the equation. -6x + 9 + x2 = -81 + 9 Reorder the terms: 9 + -6x + x2 = -81 + 9 Combine like terms: -81 + 9 = -72 9 + -6x + x2 = -72 Factor a perfect square on the left side: (x + -3)(x + -3) = -72 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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