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Simplifying 2x2 + -0.8x + 0.3 = 0 Reorder the terms: 0.3 + -0.8x + 2x2 = 0 Solving 0.3 + -0.8x + 2x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by 2 the coefficient of the squared term: Divide each side by '2'. 0.15 + -0.4x + x2 = 0 Move the constant term to the right: Add '-0.15' to each side of the equation. 0.15 + -0.4x + -0.15 + x2 = 0 + -0.15 Reorder the terms: 0.15 + -0.15 + -0.4x + x2 = 0 + -0.15 Combine like terms: 0.15 + -0.15 = 0.00 0.00 + -0.4x + x2 = 0 + -0.15 -0.4x + x2 = 0 + -0.15 Combine like terms: 0 + -0.15 = -0.15 -0.4x + x2 = -0.15 The x term is -0.4x. Take half its coefficient (-0.2). Square it (0.04) and add it to both sides. Add '0.04' to each side of the equation. -0.4x + 0.04 + x2 = -0.15 + 0.04 Reorder the terms: 0.04 + -0.4x + x2 = -0.15 + 0.04 Combine like terms: -0.15 + 0.04 = -0.11 0.04 + -0.4x + x2 = -0.11 Factor a perfect square on the left side: (x + -0.2)(x + -0.2) = -0.11 Can't calculate square root of the right side. The solution to this equation could not be determined.
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