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Simplifying 10x2 + -10x + 7 = 0 Reorder the terms: 7 + -10x + 10x2 = 0 Solving 7 + -10x + 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'. 0.7 + -1x + x2 = 0 Move the constant term to the right: Add '-0.7' to each side of the equation. 0.7 + -1x + -0.7 + x2 = 0 + -0.7 Reorder the terms: 0.7 + -0.7 + -1x + x2 = 0 + -0.7 Combine like terms: 0.7 + -0.7 = 0.0 0.0 + -1x + x2 = 0 + -0.7 -1x + x2 = 0 + -0.7 Combine like terms: 0 + -0.7 = -0.7 -1x + x2 = -0.7 The x term is -1x. Take half its coefficient (-0.5). Square it (0.25) and add it to both sides. Add '0.25' to each side of the equation. -1x + 0.25 + x2 = -0.7 + 0.25 Reorder the terms: 0.25 + -1x + x2 = -0.7 + 0.25 Combine like terms: -0.7 + 0.25 = -0.45 0.25 + -1x + x2 = -0.45 Factor a perfect square on the left side: (x + -0.5)(x + -0.5) = -0.45 Can't calculate square root of the right side. The solution to this equation could not be determined.
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