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Simplifying -2x2 + -9 + -3x + -2x2 + 8x + 7 = 0 Reorder the terms: -9 + 7 + -3x + 8x + -2x2 + -2x2 = 0 Combine like terms: -9 + 7 = -2 -2 + -3x + 8x + -2x2 + -2x2 = 0 Combine like terms: -3x + 8x = 5x -2 + 5x + -2x2 + -2x2 = 0 Combine like terms: -2x2 + -2x2 = -4x2 -2 + 5x + -4x2 = 0 Solving -2 + 5x + -4x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by -4 the coefficient of the squared term: Divide each side by '-4'. 0.5 + -1.25x + x2 = 0 Move the constant term to the right: Add '-0.5' to each side of the equation. 0.5 + -1.25x + -0.5 + x2 = 0 + -0.5 Reorder the terms: 0.5 + -0.5 + -1.25x + x2 = 0 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + -1.25x + x2 = 0 + -0.5 -1.25x + x2 = 0 + -0.5 Combine like terms: 0 + -0.5 = -0.5 -1.25x + x2 = -0.5 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 = -0.5 + 0.390625 Reorder the terms: 0.390625 + -1.25x + x2 = -0.5 + 0.390625 Combine like terms: -0.5 + 0.390625 = -0.109375 0.390625 + -1.25x + x2 = -0.109375 Factor a perfect square on the left side: (x + -0.625)(x + -0.625) = -0.109375 Can't calculate square root of the right side. The solution to this equation could not be determined.
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