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Simplifying 2x4 + -3x2 + 15 = 0 Reorder the terms: 15 + -3x2 + 2x4 = 0 Solving 15 + -3x2 + 2x4 = 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'. 7.5 + -1.5x2 + x4 = 0 Move the constant term to the right: Add '-7.5' to each side of the equation. 7.5 + -1.5x2 + -7.5 + x4 = 0 + -7.5 Reorder the terms: 7.5 + -7.5 + -1.5x2 + x4 = 0 + -7.5 Combine like terms: 7.5 + -7.5 = 0.0 0.0 + -1.5x2 + x4 = 0 + -7.5 -1.5x2 + x4 = 0 + -7.5 Combine like terms: 0 + -7.5 = -7.5 -1.5x2 + x4 = -7.5 The x term is -1.5x2. Take half its coefficient (-0.75). Square it (0.5625) and add it to both sides. Add '0.5625' to each side of the equation. -1.5x2 + 0.5625 + x4 = -7.5 + 0.5625 Reorder the terms: 0.5625 + -1.5x2 + x4 = -7.5 + 0.5625 Combine like terms: -7.5 + 0.5625 = -6.9375 0.5625 + -1.5x2 + x4 = -6.9375 Factor a perfect square on the left side: (x2 + -0.75)(x2 + -0.75) = -6.9375 Can't calculate square root of the right side. The solution to this equation could not be determined.
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