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Simplifying 4x2 + 5x = -11 Reorder the terms: 5x + 4x2 = -11 Solving 5x + 4x2 = -11 Solving for variable 'x'. Reorder the terms: 11 + 5x + 4x2 = -11 + 11 Combine like terms: -11 + 11 = 0 11 + 5x + 4x2 = 0 Begin completing the square. Divide all terms by 4 the coefficient of the squared term: Divide each side by '4'. 2.75 + 1.25x + x2 = 0 Move the constant term to the right: Add '-2.75' to each side of the equation. 2.75 + 1.25x + -2.75 + x2 = 0 + -2.75 Reorder the terms: 2.75 + -2.75 + 1.25x + x2 = 0 + -2.75 Combine like terms: 2.75 + -2.75 = 0.00 0.00 + 1.25x + x2 = 0 + -2.75 1.25x + x2 = 0 + -2.75 Combine like terms: 0 + -2.75 = -2.75 1.25x + x2 = -2.75 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 = -2.75 + 0.390625 Reorder the terms: 0.390625 + 1.25x + x2 = -2.75 + 0.390625 Combine like terms: -2.75 + 0.390625 = -2.359375 0.390625 + 1.25x + x2 = -2.359375 Factor a perfect square on the left side: (x + 0.625)(x + 0.625) = -2.359375 Can't calculate square root of the right side. The solution to this equation could not be determined.
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