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Simplifying 7b2 + -8b + 4 = 0 Reorder the terms: 4 + -8b + 7b2 = 0 Solving 4 + -8b + 7b2 = 0 Solving for variable 'b'. Begin completing the square. Divide all terms by 7 the coefficient of the squared term: Divide each side by '7'. 0.5714285714 + -1.142857143b + b2 = 0 Move the constant term to the right: Add '-0.5714285714' to each side of the equation. 0.5714285714 + -1.142857143b + -0.5714285714 + b2 = 0 + -0.5714285714 Reorder the terms: 0.5714285714 + -0.5714285714 + -1.142857143b + b2 = 0 + -0.5714285714 Combine like terms: 0.5714285714 + -0.5714285714 = 0.0000000000 0.0000000000 + -1.142857143b + b2 = 0 + -0.5714285714 -1.142857143b + b2 = 0 + -0.5714285714 Combine like terms: 0 + -0.5714285714 = -0.5714285714 -1.142857143b + b2 = -0.5714285714 The b term is -1.142857143b. 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. -1.142857143b + 0.3265306123 + b2 = -0.5714285714 + 0.3265306123 Reorder the terms: 0.3265306123 + -1.142857143b + b2 = -0.5714285714 + 0.3265306123 Combine like terms: -0.5714285714 + 0.3265306123 = -0.2448979591 0.3265306123 + -1.142857143b + b2 = -0.2448979591 Factor a perfect square on the left side: (b + -0.5714285715)(b + -0.5714285715) = -0.2448979591 Can't calculate square root of the right side. The solution to this equation could not be determined.
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