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Simplifying x2 + -0.3x + 115 = 0 Reorder the terms: 115 + -0.3x + x2 = 0 Solving 115 + -0.3x + x2 = 0 Solving for variable 'x'. Begin completing the square. Move the constant term to the right: Add '-115' to each side of the equation. 115 + -0.3x + -115 + x2 = 0 + -115 Reorder the terms: 115 + -115 + -0.3x + x2 = 0 + -115 Combine like terms: 115 + -115 = 0 0 + -0.3x + x2 = 0 + -115 -0.3x + x2 = 0 + -115 Combine like terms: 0 + -115 = -115 -0.3x + x2 = -115 The x term is -0.3x. Take half its coefficient (-0.15). Square it (0.0225) and add it to both sides. Add '0.0225' to each side of the equation. -0.3x + 0.0225 + x2 = -115 + 0.0225 Reorder the terms: 0.0225 + -0.3x + x2 = -115 + 0.0225 Combine like terms: -115 + 0.0225 = -114.9775 0.0225 + -0.3x + x2 = -114.9775 Factor a perfect square on the left side: (x + -0.15)(x + -0.15) = -114.9775 Can't calculate square root of the right side. The solution to this equation could not be determined.
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