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Simplifying -10x2 + 3x + -4 = 0 Reorder the terms: -4 + 3x + -10x2 = 0 Solving -4 + 3x + -10x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by -10 the coefficient of the squared term: Divide each side by '-10'. 0.4 + -0.3x + x2 = 0 Move the constant term to the right: Add '-0.4' to each side of the equation. 0.4 + -0.3x + -0.4 + x2 = 0 + -0.4 Reorder the terms: 0.4 + -0.4 + -0.3x + x2 = 0 + -0.4 Combine like terms: 0.4 + -0.4 = 0.0 0.0 + -0.3x + x2 = 0 + -0.4 -0.3x + x2 = 0 + -0.4 Combine like terms: 0 + -0.4 = -0.4 -0.3x + x2 = -0.4 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 = -0.4 + 0.0225 Reorder the terms: 0.0225 + -0.3x + x2 = -0.4 + 0.0225 Combine like terms: -0.4 + 0.0225 = -0.3775 0.0225 + -0.3x + x2 = -0.3775 Factor a perfect square on the left side: (x + -0.15)(x + -0.15) = -0.3775 Can't calculate square root of the right side. The solution to this equation could not be determined.
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