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Simplifying -1(7x2 + -9x + 9) = 0 Reorder the terms: -1(9 + -9x + 7x2) = 0 (9 * -1 + -9x * -1 + 7x2 * -1) = 0 (-9 + 9x + -7x2) = 0 Solving -9 + 9x + -7x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by -7 the coefficient of the squared term: Divide each side by '-7'. 1.285714286 + -1.285714286x + x2 = 0 Move the constant term to the right: Add '-1.285714286' to each side of the equation. 1.285714286 + -1.285714286x + -1.285714286 + x2 = 0 + -1.285714286 Reorder the terms: 1.285714286 + -1.285714286 + -1.285714286x + x2 = 0 + -1.285714286 Combine like terms: 1.285714286 + -1.285714286 = 0.000000000 0.000000000 + -1.285714286x + x2 = 0 + -1.285714286 -1.285714286x + x2 = 0 + -1.285714286 Combine like terms: 0 + -1.285714286 = -1.285714286 -1.285714286x + x2 = -1.285714286 The x term is -1.285714286x. Take half its coefficient (-0.642857143). Square it (0.4132653063) and add it to both sides. Add '0.4132653063' to each side of the equation. -1.285714286x + 0.4132653063 + x2 = -1.285714286 + 0.4132653063 Reorder the terms: 0.4132653063 + -1.285714286x + x2 = -1.285714286 + 0.4132653063 Combine like terms: -1.285714286 + 0.4132653063 = -0.8724489797 0.4132653063 + -1.285714286x + x2 = -0.8724489797 Factor a perfect square on the left side: (x + -0.642857143)(x + -0.642857143) = -0.8724489797 Can't calculate square root of the right side. The solution to this equation could not be determined.
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