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Simplifying -4x2 + 13x + -12 = 0 Reorder the terms: -12 + 13x + -4x2 = 0 Solving -12 + 13x + -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'. 3 + -3.25x + x2 = 0 Move the constant term to the right: Add '-3' to each side of the equation. 3 + -3.25x + -3 + x2 = 0 + -3 Reorder the terms: 3 + -3 + -3.25x + x2 = 0 + -3 Combine like terms: 3 + -3 = 0 0 + -3.25x + x2 = 0 + -3 -3.25x + x2 = 0 + -3 Combine like terms: 0 + -3 = -3 -3.25x + x2 = -3 The x term is -3.25x. Take half its coefficient (-1.625). Square it (2.640625) and add it to both sides. Add '2.640625' to each side of the equation. -3.25x + 2.640625 + x2 = -3 + 2.640625 Reorder the terms: 2.640625 + -3.25x + x2 = -3 + 2.640625 Combine like terms: -3 + 2.640625 = -0.359375 2.640625 + -3.25x + x2 = -0.359375 Factor a perfect square on the left side: (x + -1.625)(x + -1.625) = -0.359375 Can't calculate square root of the right side. The solution to this equation could not be determined.
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