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Simplifying 2x2 + -7x + 9 = 2 + -3x Reorder the terms: 9 + -7x + 2x2 = 2 + -3x Solving 9 + -7x + 2x2 = 2 + -3x Solving for variable 'x'. Reorder the terms: 9 + -2 + -7x + 3x + 2x2 = 2 + -3x + -2 + 3x Combine like terms: 9 + -2 = 7 7 + -7x + 3x + 2x2 = 2 + -3x + -2 + 3x Combine like terms: -7x + 3x = -4x 7 + -4x + 2x2 = 2 + -3x + -2 + 3x Reorder the terms: 7 + -4x + 2x2 = 2 + -2 + -3x + 3x Combine like terms: 2 + -2 = 0 7 + -4x + 2x2 = 0 + -3x + 3x 7 + -4x + 2x2 = -3x + 3x Combine like terms: -3x + 3x = 0 7 + -4x + 2x2 = 0 Begin completing the square. Divide all terms by 2 the coefficient of the squared term: Divide each side by '2'. 3.5 + -2x + x2 = 0 Move the constant term to the right: Add '-3.5' to each side of the equation. 3.5 + -2x + -3.5 + x2 = 0 + -3.5 Reorder the terms: 3.5 + -3.5 + -2x + x2 = 0 + -3.5 Combine like terms: 3.5 + -3.5 = 0.0 0.0 + -2x + x2 = 0 + -3.5 -2x + x2 = 0 + -3.5 Combine like terms: 0 + -3.5 = -3.5 -2x + x2 = -3.5 The x term is -2x. Take half its coefficient (-1). Square it (1) and add it to both sides. Add '1' to each side of the equation. -2x + 1 + x2 = -3.5 + 1 Reorder the terms: 1 + -2x + x2 = -3.5 + 1 Combine like terms: -3.5 + 1 = -2.5 1 + -2x + x2 = -2.5 Factor a perfect square on the left side: (x + -1)(x + -1) = -2.5 Can't calculate square root of the right side. The solution to this equation could not be determined.
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