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Simplifying 5x2 + 6x + 20 = 0 Reorder the terms: 20 + 6x + 5x2 = 0 Solving 20 + 6x + 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'. 4 + 1.2x + x2 = 0 Move the constant term to the right: Add '-4' to each side of the equation. 4 + 1.2x + -4 + x2 = 0 + -4 Reorder the terms: 4 + -4 + 1.2x + x2 = 0 + -4 Combine like terms: 4 + -4 = 0 0 + 1.2x + x2 = 0 + -4 1.2x + x2 = 0 + -4 Combine like terms: 0 + -4 = -4 1.2x + x2 = -4 The x term is 1.2x. Take half its coefficient (0.6). Square it (0.36) and add it to both sides. Add '0.36' to each side of the equation. 1.2x + 0.36 + x2 = -4 + 0.36 Reorder the terms: 0.36 + 1.2x + x2 = -4 + 0.36 Combine like terms: -4 + 0.36 = -3.64 0.36 + 1.2x + x2 = -3.64 Factor a perfect square on the left side: (x + 0.6)(x + 0.6) = -3.64 Can't calculate square root of the right side. The solution to this equation could not be determined.
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