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Simplifying -3x(5 + -2x) + -3 + 122 = 0 (5 * -3x + -2x * -3x) + -3 + 122 = 0 (-15x + 6x2) + -3 + 122 = 0 Reorder the terms: -3 + 122 + -15x + 6x2 = 0 Combine like terms: -3 + 122 = 119 119 + -15x + 6x2 = 0 Solving 119 + -15x + 6x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by 6 the coefficient of the squared term: Divide each side by '6'. 19.83333333 + -2.5x + x2 = 0 Move the constant term to the right: Add '-19.83333333' to each side of the equation. 19.83333333 + -2.5x + -19.83333333 + x2 = 0 + -19.83333333 Reorder the terms: 19.83333333 + -19.83333333 + -2.5x + x2 = 0 + -19.83333333 Combine like terms: 19.83333333 + -19.83333333 = 0.00000000 0.00000000 + -2.5x + x2 = 0 + -19.83333333 -2.5x + x2 = 0 + -19.83333333 Combine like terms: 0 + -19.83333333 = -19.83333333 -2.5x + x2 = -19.83333333 The x term is -2.5x. Take half its coefficient (-1.25). Square it (1.5625) and add it to both sides. Add '1.5625' to each side of the equation. -2.5x + 1.5625 + x2 = -19.83333333 + 1.5625 Reorder the terms: 1.5625 + -2.5x + x2 = -19.83333333 + 1.5625 Combine like terms: -19.83333333 + 1.5625 = -18.27083333 1.5625 + -2.5x + x2 = -18.27083333 Factor a perfect square on the left side: (x + -1.25)(x + -1.25) = -18.27083333 Can't calculate square root of the right side. The solution to this equation could not be determined.
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