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Simplifying -9x2 + 2x + -15 = 0 Reorder the terms: -15 + 2x + -9x2 = 0 Solving -15 + 2x + -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'. 1.666666667 + -0.2222222222x + x2 = 0 Move the constant term to the right: Add '-1.666666667' to each side of the equation. 1.666666667 + -0.2222222222x + -1.666666667 + x2 = 0 + -1.666666667 Reorder the terms: 1.666666667 + -1.666666667 + -0.2222222222x + x2 = 0 + -1.666666667 Combine like terms: 1.666666667 + -1.666666667 = 0.000000000 0.000000000 + -0.2222222222x + x2 = 0 + -1.666666667 -0.2222222222x + x2 = 0 + -1.666666667 Combine like terms: 0 + -1.666666667 = -1.666666667 -0.2222222222x + x2 = -1.666666667 The x term is -0.2222222222x. Take half its coefficient (-0.1111111111). Square it (0.01234567901) and add it to both sides. Add '0.01234567901' to each side of the equation. -0.2222222222x + 0.01234567901 + x2 = -1.666666667 + 0.01234567901 Reorder the terms: 0.01234567901 + -0.2222222222x + x2 = -1.666666667 + 0.01234567901 Combine like terms: -1.666666667 + 0.01234567901 = -1.65432098799 0.01234567901 + -0.2222222222x + x2 = -1.65432098799 Factor a perfect square on the left side: (x + -0.1111111111)(x + -0.1111111111) = -1.65432098799 Can't calculate square root of the right side. The solution to this equation could not be determined.
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