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Simplifying x2 + 72 = 3x Reorder the terms: 72 + x2 = 3x Solving 72 + x2 = 3x Solving for variable 'x'. Reorder the terms: 72 + -3x + x2 = 3x + -3x Combine like terms: 3x + -3x = 0 72 + -3x + x2 = 0 Begin completing the square. Move the constant term to the right: Add '-72' to each side of the equation. 72 + -3x + -72 + x2 = 0 + -72 Reorder the terms: 72 + -72 + -3x + x2 = 0 + -72 Combine like terms: 72 + -72 = 0 0 + -3x + x2 = 0 + -72 -3x + x2 = 0 + -72 Combine like terms: 0 + -72 = -72 -3x + x2 = -72 The x term is -3x. Take half its coefficient (-1.5). Square it (2.25) and add it to both sides. Add '2.25' to each side of the equation. -3x + 2.25 + x2 = -72 + 2.25 Reorder the terms: 2.25 + -3x + x2 = -72 + 2.25 Combine like terms: -72 + 2.25 = -69.75 2.25 + -3x + x2 = -69.75 Factor a perfect square on the left side: (x + -1.5)(x + -1.5) = -69.75 Can't calculate square root of the right side. The solution to this equation could not be determined.
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