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Simplifying -9x2 + 7x + -125 = 0 Reorder the terms: -125 + 7x + -9x2 = 0 Solving -125 + 7x + -9x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by -9 the coefficient of the squared term: Divide each side by '-9'. 13.88888889 + -0.7777777778x + x2 = 0 Move the constant term to the right: Add '-13.88888889' to each side of the equation. 13.88888889 + -0.7777777778x + -13.88888889 + x2 = 0 + -13.88888889 Reorder the terms: 13.88888889 + -13.88888889 + -0.7777777778x + x2 = 0 + -13.88888889 Combine like terms: 13.88888889 + -13.88888889 = 0.00000000 0.00000000 + -0.7777777778x + x2 = 0 + -13.88888889 -0.7777777778x + x2 = 0 + -13.88888889 Combine like terms: 0 + -13.88888889 = -13.88888889 -0.7777777778x + x2 = -13.88888889 The x term is -0.7777777778x. Take half its coefficient (-0.3888888889). Square it (0.1512345679) and add it to both sides. Add '0.1512345679' to each side of the equation. -0.7777777778x + 0.1512345679 + x2 = -13.88888889 + 0.1512345679 Reorder the terms: 0.1512345679 + -0.7777777778x + x2 = -13.88888889 + 0.1512345679 Combine like terms: -13.88888889 + 0.1512345679 = -13.7376543221 0.1512345679 + -0.7777777778x + x2 = -13.7376543221 Factor a perfect square on the left side: (x + -0.3888888889)(x + -0.3888888889) = -13.7376543221 Can't calculate square root of the right side. The solution to this equation could not be determined.
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