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Simplifying x2 + -15x + 64 = 0 Reorder the terms: 64 + -15x + x2 = 0 Solving 64 + -15x + x2 = 0 Solving for variable 'x'. Begin completing the square. Move the constant term to the right: Add '-64' to each side of the equation. 64 + -15x + -64 + x2 = 0 + -64 Reorder the terms: 64 + -64 + -15x + x2 = 0 + -64 Combine like terms: 64 + -64 = 0 0 + -15x + x2 = 0 + -64 -15x + x2 = 0 + -64 Combine like terms: 0 + -64 = -64 -15x + x2 = -64 The x term is -15x. Take half its coefficient (-7.5). Square it (56.25) and add it to both sides. Add '56.25' to each side of the equation. -15x + 56.25 + x2 = -64 + 56.25 Reorder the terms: 56.25 + -15x + x2 = -64 + 56.25 Combine like terms: -64 + 56.25 = -7.75 56.25 + -15x + x2 = -7.75 Factor a perfect square on the left side: (x + -7.5)(x + -7.5) = -7.75 Can't calculate square root of the right side. The solution to this equation could not be determined.
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