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Simplifying 5x * x + 2x + 9 = -8 Multiply x * x 5x2 + 2x + 9 = -8 Reorder the terms: 9 + 2x + 5x2 = -8 Solving 9 + 2x + 5x2 = -8 Solving for variable 'x'. Reorder the terms: 9 + 8 + 2x + 5x2 = -8 + 8 Combine like terms: 9 + 8 = 17 17 + 2x + 5x2 = -8 + 8 Combine like terms: -8 + 8 = 0 17 + 2x + 5x2 = 0 Begin completing the square. Divide all terms by 5 the coefficient of the squared term: Divide each side by '5'. 3.4 + 0.4x + x2 = 0 Move the constant term to the right: Add '-3.4' to each side of the equation. 3.4 + 0.4x + -3.4 + x2 = 0 + -3.4 Reorder the terms: 3.4 + -3.4 + 0.4x + x2 = 0 + -3.4 Combine like terms: 3.4 + -3.4 = 0.0 0.0 + 0.4x + x2 = 0 + -3.4 0.4x + x2 = 0 + -3.4 Combine like terms: 0 + -3.4 = -3.4 0.4x + x2 = -3.4 The x term is 0.4x. Take half its coefficient (0.2). Square it (0.04) and add it to both sides. Add '0.04' to each side of the equation. 0.4x + 0.04 + x2 = -3.4 + 0.04 Reorder the terms: 0.04 + 0.4x + x2 = -3.4 + 0.04 Combine like terms: -3.4 + 0.04 = -3.36 0.04 + 0.4x + x2 = -3.36 Factor a perfect square on the left side: (x + 0.2)(x + 0.2) = -3.36 Can't calculate square root of the right side. The solution to this equation could not be determined.
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