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Simplifying (9x2 + -1x + 2) + -1(4x2 + 2x) = 0 Reorder the terms: (2 + -1x + 9x2) + -1(4x2 + 2x) = 0 Remove parenthesis around (2 + -1x + 9x2) 2 + -1x + 9x2 + -1(4x2 + 2x) = 0 Reorder the terms: 2 + -1x + 9x2 + -1(2x + 4x2) = 0 2 + -1x + 9x2 + (2x * -1 + 4x2 * -1) = 0 2 + -1x + 9x2 + (-2x + -4x2) = 0 Reorder the terms: 2 + -1x + -2x + 9x2 + -4x2 = 0 Combine like terms: -1x + -2x = -3x 2 + -3x + 9x2 + -4x2 = 0 Combine like terms: 9x2 + -4x2 = 5x2 2 + -3x + 5x2 = 0 Solving 2 + -3x + 5x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by 5 the coefficient of the squared term: Divide each side by '5'. 0.4 + -0.6x + x2 = 0 Move the constant term to the right: Add '-0.4' to each side of the equation. 0.4 + -0.6x + -0.4 + x2 = 0 + -0.4 Reorder the terms: 0.4 + -0.4 + -0.6x + x2 = 0 + -0.4 Combine like terms: 0.4 + -0.4 = 0.0 0.0 + -0.6x + x2 = 0 + -0.4 -0.6x + x2 = 0 + -0.4 Combine like terms: 0 + -0.4 = -0.4 -0.6x + x2 = -0.4 The x term is -0.6x. Take half its coefficient (-0.3). Square it (0.09) and add it to both sides. Add '0.09' to each side of the equation. -0.6x + 0.09 + x2 = -0.4 + 0.09 Reorder the terms: 0.09 + -0.6x + x2 = -0.4 + 0.09 Combine like terms: -0.4 + 0.09 = -0.31 0.09 + -0.6x + x2 = -0.31 Factor a perfect square on the left side: (x + -0.3)(x + -0.3) = -0.31 Can't calculate square root of the right side. The solution to this equation could not be determined.
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