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Simplifying x2 + -4x + 15 = 2 Reorder the terms: 15 + -4x + x2 = 2 Solving 15 + -4x + x2 = 2 Solving for variable 'x'. Reorder the terms: 15 + -2 + -4x + x2 = 2 + -2 Combine like terms: 15 + -2 = 13 13 + -4x + x2 = 2 + -2 Combine like terms: 2 + -2 = 0 13 + -4x + x2 = 0 Begin completing the square. Move the constant term to the right: Add '-13' to each side of the equation. 13 + -4x + -13 + x2 = 0 + -13 Reorder the terms: 13 + -13 + -4x + x2 = 0 + -13 Combine like terms: 13 + -13 = 0 0 + -4x + x2 = 0 + -13 -4x + x2 = 0 + -13 Combine like terms: 0 + -13 = -13 -4x + x2 = -13 The x term is -4x. Take half its coefficient (-2). Square it (4) and add it to both sides. Add '4' to each side of the equation. -4x + 4 + x2 = -13 + 4 Reorder the terms: 4 + -4x + x2 = -13 + 4 Combine like terms: -13 + 4 = -9 4 + -4x + x2 = -9 Factor a perfect square on the left side: (x + -2)(x + -2) = -9 Can't calculate square root of the right side. The solution to this equation could not be determined.
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