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Simplifying 2x2 + 10x + 715 = 0 Reorder the terms: 715 + 10x + 2x2 = 0 Solving 715 + 10x + 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'. 357.5 + 5x + x2 = 0 Move the constant term to the right: Add '-357.5' to each side of the equation. 357.5 + 5x + -357.5 + x2 = 0 + -357.5 Reorder the terms: 357.5 + -357.5 + 5x + x2 = 0 + -357.5 Combine like terms: 357.5 + -357.5 = 0.0 0.0 + 5x + x2 = 0 + -357.5 5x + x2 = 0 + -357.5 Combine like terms: 0 + -357.5 = -357.5 5x + x2 = -357.5 The x term is 5x. Take half its coefficient (2.5). Square it (6.25) and add it to both sides. Add '6.25' to each side of the equation. 5x + 6.25 + x2 = -357.5 + 6.25 Reorder the terms: 6.25 + 5x + x2 = -357.5 + 6.25 Combine like terms: -357.5 + 6.25 = -351.25 6.25 + 5x + x2 = -351.25 Factor a perfect square on the left side: (x + 2.5)(x + 2.5) = -351.25 Can't calculate square root of the right side. The solution to this equation could not be determined.
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