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Simplifying 4x2 = 5x + -9 Reorder the terms: 4x2 = -9 + 5x Solving 4x2 = -9 + 5x Solving for variable 'x'. Reorder the terms: 9 + -5x + 4x2 = -9 + 5x + 9 + -5x Reorder the terms: 9 + -5x + 4x2 = -9 + 9 + 5x + -5x Combine like terms: -9 + 9 = 0 9 + -5x + 4x2 = 0 + 5x + -5x 9 + -5x + 4x2 = 5x + -5x Combine like terms: 5x + -5x = 0 9 + -5x + 4x2 = 0 Begin completing the square. Divide all terms by 4 the coefficient of the squared term: Divide each side by '4'. 2.25 + -1.25x + x2 = 0 Move the constant term to the right: Add '-2.25' to each side of the equation. 2.25 + -1.25x + -2.25 + x2 = 0 + -2.25 Reorder the terms: 2.25 + -2.25 + -1.25x + x2 = 0 + -2.25 Combine like terms: 2.25 + -2.25 = 0.00 0.00 + -1.25x + x2 = 0 + -2.25 -1.25x + x2 = 0 + -2.25 Combine like terms: 0 + -2.25 = -2.25 -1.25x + x2 = -2.25 The x term is -1.25x. Take half its coefficient (-0.625). Square it (0.390625) and add it to both sides. Add '0.390625' to each side of the equation. -1.25x + 0.390625 + x2 = -2.25 + 0.390625 Reorder the terms: 0.390625 + -1.25x + x2 = -2.25 + 0.390625 Combine like terms: -2.25 + 0.390625 = -1.859375 0.390625 + -1.25x + x2 = -1.859375 Factor a perfect square on the left side: (x + -0.625)(x + -0.625) = -1.859375 Can't calculate square root of the right side. The solution to this equation could not be determined.
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