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Simplifying 0 = 2x2 + -7x + 99 Reorder the terms: 0 = 99 + -7x + 2x2 Solving 0 = 99 + -7x + 2x2 Solving for variable 'x'. Combine like terms: 0 + -99 = -99 -99 + 7x + -2x2 = 99 + -7x + 2x2 + -99 + 7x + -2x2 Reorder the terms: -99 + 7x + -2x2 = 99 + -99 + -7x + 7x + 2x2 + -2x2 Combine like terms: 99 + -99 = 0 -99 + 7x + -2x2 = 0 + -7x + 7x + 2x2 + -2x2 -99 + 7x + -2x2 = -7x + 7x + 2x2 + -2x2 Combine like terms: -7x + 7x = 0 -99 + 7x + -2x2 = 0 + 2x2 + -2x2 -99 + 7x + -2x2 = 2x2 + -2x2 Combine like terms: 2x2 + -2x2 = 0 -99 + 7x + -2x2 = 0 Begin completing the square. Divide all terms by -2 the coefficient of the squared term: Divide each side by '-2'. 49.5 + -3.5x + x2 = 0 Move the constant term to the right: Add '-49.5' to each side of the equation. 49.5 + -3.5x + -49.5 + x2 = 0 + -49.5 Reorder the terms: 49.5 + -49.5 + -3.5x + x2 = 0 + -49.5 Combine like terms: 49.5 + -49.5 = 0.0 0.0 + -3.5x + x2 = 0 + -49.5 -3.5x + x2 = 0 + -49.5 Combine like terms: 0 + -49.5 = -49.5 -3.5x + x2 = -49.5 The x term is -3.5x. Take half its coefficient (-1.75). Square it (3.0625) and add it to both sides. Add '3.0625' to each side of the equation. -3.5x + 3.0625 + x2 = -49.5 + 3.0625 Reorder the terms: 3.0625 + -3.5x + x2 = -49.5 + 3.0625 Combine like terms: -49.5 + 3.0625 = -46.4375 3.0625 + -3.5x + x2 = -46.4375 Factor a perfect square on the left side: (x + -1.75)(x + -1.75) = -46.4375 Can't calculate square root of the right side. The solution to this equation could not be determined.
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