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Simplifying (9x)(9x) + 18x + 8 = 0 Remove parenthesis around (9x) 9x(9x) + 18x + 8 = 0 Remove parenthesis around (9x) 9x * 9x + 18x + 8 = 0 Reorder the terms for easier multiplication: 9 * 9x * x + 18x + 8 = 0 Multiply 9 * 9 81x * x + 18x + 8 = 0 Multiply x * x 81x2 + 18x + 8 = 0 Reorder the terms: 8 + 18x + 81x2 = 0 Solving 8 + 18x + 81x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by 81 the coefficient of the squared term: Divide each side by '81'. 0.0987654321 + 0.2222222222x + x2 = 0 Move the constant term to the right: Add '-0.0987654321' to each side of the equation. 0.0987654321 + 0.2222222222x + -0.0987654321 + x2 = 0 + -0.0987654321 Reorder the terms: 0.0987654321 + -0.0987654321 + 0.2222222222x + x2 = 0 + -0.0987654321 Combine like terms: 0.0987654321 + -0.0987654321 = 0.0000000000 0.0000000000 + 0.2222222222x + x2 = 0 + -0.0987654321 0.2222222222x + x2 = 0 + -0.0987654321 Combine like terms: 0 + -0.0987654321 = -0.0987654321 0.2222222222x + x2 = -0.0987654321 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 = -0.0987654321 + 0.01234567901 Reorder the terms: 0.01234567901 + 0.2222222222x + x2 = -0.0987654321 + 0.01234567901 Combine like terms: -0.0987654321 + 0.01234567901 = -0.08641975309 0.01234567901 + 0.2222222222x + x2 = -0.08641975309 Factor a perfect square on the left side: (x + 0.1111111111)(x + 0.1111111111) = -0.08641975309 Can't calculate square root of the right side. The solution to this equation could not be determined.
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