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Simplifying 2x2 + -7x + 28 = 0 Reorder the terms: 28 + -7x + 2x2 = 0 Solving 28 + -7x + 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'. 14 + -3.5x + x2 = 0 Move the constant term to the right: Add '-14' to each side of the equation. 14 + -3.5x + -14 + x2 = 0 + -14 Reorder the terms: 14 + -14 + -3.5x + x2 = 0 + -14 Combine like terms: 14 + -14 = 0 0 + -3.5x + x2 = 0 + -14 -3.5x + x2 = 0 + -14 Combine like terms: 0 + -14 = -14 -3.5x + x2 = -14 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 = -14 + 3.0625 Reorder the terms: 3.0625 + -3.5x + x2 = -14 + 3.0625 Combine like terms: -14 + 3.0625 = -10.9375 3.0625 + -3.5x + x2 = -10.9375 Factor a perfect square on the left side: (x + -1.75)(x + -1.75) = -10.9375 Can't calculate square root of the right side. The solution to this equation could not be determined.
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