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Simplifying -9 + -9x2 + 16x + -7 = 0 Reorder the terms: -9 + -7 + 16x + -9x2 = 0 Combine like terms: -9 + -7 = -16 -16 + 16x + -9x2 = 0 Solving -16 + 16x + -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'. 1.777777778 + -1.777777778x + x2 = 0 Move the constant term to the right: Add '-1.777777778' to each side of the equation. 1.777777778 + -1.777777778x + -1.777777778 + x2 = 0 + -1.777777778 Reorder the terms: 1.777777778 + -1.777777778 + -1.777777778x + x2 = 0 + -1.777777778 Combine like terms: 1.777777778 + -1.777777778 = 0.000000000 0.000000000 + -1.777777778x + x2 = 0 + -1.777777778 -1.777777778x + x2 = 0 + -1.777777778 Combine like terms: 0 + -1.777777778 = -1.777777778 -1.777777778x + x2 = -1.777777778 The x term is -1.777777778x. Take half its coefficient (-0.888888889). Square it (0.7901234570) and add it to both sides. Add '0.7901234570' to each side of the equation. -1.777777778x + 0.7901234570 + x2 = -1.777777778 + 0.7901234570 Reorder the terms: 0.7901234570 + -1.777777778x + x2 = -1.777777778 + 0.7901234570 Combine like terms: -1.777777778 + 0.7901234570 = -0.987654321 0.7901234570 + -1.777777778x + x2 = -0.987654321 Factor a perfect square on the left side: (x + -0.888888889)(x + -0.888888889) = -0.987654321 Can't calculate square root of the right side. The solution to this equation could not be determined.
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