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Simplifying 7x2 + 10x + 7 = 0 Reorder the terms: 7 + 10x + 7x2 = 0 Solving 7 + 10x + 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'. 1 + 1.428571429x + x2 = 0 Move the constant term to the right: Add '-1' to each side of the equation. 1 + 1.428571429x + -1 + x2 = 0 + -1 Reorder the terms: 1 + -1 + 1.428571429x + x2 = 0 + -1 Combine like terms: 1 + -1 = 0 0 + 1.428571429x + x2 = 0 + -1 1.428571429x + x2 = 0 + -1 Combine like terms: 0 + -1 = -1 1.428571429x + x2 = -1 The x term is 1.428571429x. Take half its coefficient (0.7142857145). Square it (0.5102040819) and add it to both sides. Add '0.5102040819' to each side of the equation. 1.428571429x + 0.5102040819 + x2 = -1 + 0.5102040819 Reorder the terms: 0.5102040819 + 1.428571429x + x2 = -1 + 0.5102040819 Combine like terms: -1 + 0.5102040819 = -0.4897959181 0.5102040819 + 1.428571429x + x2 = -0.4897959181 Factor a perfect square on the left side: (x + 0.7142857145)(x + 0.7142857145) = -0.4897959181 Can't calculate square root of the right side. The solution to this equation could not be determined.
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