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Simplifying -9x2 + 8x = 11 Reorder the terms: 8x + -9x2 = 11 Solving 8x + -9x2 = 11 Solving for variable 'x'. Reorder the terms: -11 + 8x + -9x2 = 11 + -11 Combine like terms: 11 + -11 = 0 -11 + 8x + -9x2 = 0 Begin completing the square. Divide all terms by -9 the coefficient of the squared term: Divide each side by '-9'. 1.222222222 + -0.8888888889x + x2 = 0 Move the constant term to the right: Add '-1.222222222' to each side of the equation. 1.222222222 + -0.8888888889x + -1.222222222 + x2 = 0 + -1.222222222 Reorder the terms: 1.222222222 + -1.222222222 + -0.8888888889x + x2 = 0 + -1.222222222 Combine like terms: 1.222222222 + -1.222222222 = 0.000000000 0.000000000 + -0.8888888889x + x2 = 0 + -1.222222222 -0.8888888889x + x2 = 0 + -1.222222222 Combine like terms: 0 + -1.222222222 = -1.222222222 -0.8888888889x + x2 = -1.222222222 The x term is -0.8888888889x. Take half its coefficient (-0.4444444445). Square it (0.1975308642) and add it to both sides. Add '0.1975308642' to each side of the equation. -0.8888888889x + 0.1975308642 + x2 = -1.222222222 + 0.1975308642 Reorder the terms: 0.1975308642 + -0.8888888889x + x2 = -1.222222222 + 0.1975308642 Combine like terms: -1.222222222 + 0.1975308642 = -1.0246913578 0.1975308642 + -0.8888888889x + x2 = -1.0246913578 Factor a perfect square on the left side: (x + -0.4444444445)(x + -0.4444444445) = -1.0246913578 Can't calculate square root of the right side. The solution to this equation could not be determined.
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