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Simplifying 7x2 + 8x + 20 = 0 Reorder the terms: 20 + 8x + 7x2 = 0 Solving 20 + 8x + 7x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by 7 the coefficient of the squared term: Divide each side by '7'. 2.857142857 + 1.142857143x + x2 = 0 Move the constant term to the right: Add '-2.857142857' to each side of the equation. 2.857142857 + 1.142857143x + -2.857142857 + x2 = 0 + -2.857142857 Reorder the terms: 2.857142857 + -2.857142857 + 1.142857143x + x2 = 0 + -2.857142857 Combine like terms: 2.857142857 + -2.857142857 = 0.000000000 0.000000000 + 1.142857143x + x2 = 0 + -2.857142857 1.142857143x + x2 = 0 + -2.857142857 Combine like terms: 0 + -2.857142857 = -2.857142857 1.142857143x + x2 = -2.857142857 The x term is 1.142857143x. Take half its coefficient (0.5714285715). Square it (0.3265306123) and add it to both sides. Add '0.3265306123' to each side of the equation. 1.142857143x + 0.3265306123 + x2 = -2.857142857 + 0.3265306123 Reorder the terms: 0.3265306123 + 1.142857143x + x2 = -2.857142857 + 0.3265306123 Combine like terms: -2.857142857 + 0.3265306123 = -2.5306122447 0.3265306123 + 1.142857143x + x2 = -2.5306122447 Factor a perfect square on the left side: (x + 0.5714285715)(x + 0.5714285715) = -2.5306122447 Can't calculate square root of the right side. The solution to this equation could not be determined.
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