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Simplifying 2x2 + -1x + 6x + 13 = 0 Reorder the terms: 13 + -1x + 6x + 2x2 = 0 Combine like terms: -1x + 6x = 5x 13 + 5x + 2x2 = 0 Solving 13 + 5x + 2x2 = 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'. 6.5 + 2.5x + x2 = 0 Move the constant term to the right: Add '-6.5' to each side of the equation. 6.5 + 2.5x + -6.5 + x2 = 0 + -6.5 Reorder the terms: 6.5 + -6.5 + 2.5x + x2 = 0 + -6.5 Combine like terms: 6.5 + -6.5 = 0.0 0.0 + 2.5x + x2 = 0 + -6.5 2.5x + x2 = 0 + -6.5 Combine like terms: 0 + -6.5 = -6.5 2.5x + x2 = -6.5 The x term is 2.5x. Take half its coefficient (1.25). Square it (1.5625) and add it to both sides. Add '1.5625' to each side of the equation. 2.5x + 1.5625 + x2 = -6.5 + 1.5625 Reorder the terms: 1.5625 + 2.5x + x2 = -6.5 + 1.5625 Combine like terms: -6.5 + 1.5625 = -4.9375 1.5625 + 2.5x + x2 = -4.9375 Factor a perfect square on the left side: (x + 1.25)(x + 1.25) = -4.9375 Can't calculate square root of the right side. The solution to this equation could not be determined.
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